(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.mqtt = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
	(function (process,global){
	'use strict'
	
	/**
	 * Module dependencies
	 */
	var events = require('events')
	var Store = require('./store')
	var mqttPacket = require('mqtt-packet')
	var Writable = require('readable-stream').Writable
	var inherits = require('inherits')
	var reInterval = require('reinterval')
	var validations = require('./validations')
	var xtend = require('xtend')
	var setImmediate = global.setImmediate || function (callback) {
		// works in node v0.8
		process.nextTick(callback)
	}
	var defaultConnectOptions = {
		keepalive: 60,
		reschedulePings: true,
		protocolId: 'MQTT',
		protocolVersion: 4,
		reconnectPeriod: 1000,
		connectTimeout: 30 * 1000,
		clean: true,
		resubscribe: true
	}
	var errors = {
		0: '',
		1: 'Unacceptable protocol version',
		2: 'Identifier rejected',
		3: 'Server unavailable',
		4: 'Bad username or password',
		5: 'Not authorized',
		16: 'No matching subscribers',
		17: 'No subscription existed',
		128: 'Unspecified error',
		129: 'Malformed Packet',
		130: 'Protocol Error',
		131: 'Implementation specific error',
		132: 'Unsupported Protocol Version',
		133: 'Client Identifier not valid',
		134: 'Bad User Name or Password',
		135: 'Not authorized',
		136: 'Server unavailable',
		137: 'Server busy',
		138: 'Banned',
		139: 'Server shutting down',
		140: 'Bad authentication method',
		141: 'Keep Alive timeout',
		142: 'Session taken over',
		143: 'Topic Filter invalid',
		144: 'Topic Name invalid',
		145: 'Packet identifier in use',
		146: 'Packet Identifier not found',
		147: 'Receive Maximum exceeded',
		148: 'Topic Alias invalid',
		149: 'Packet too large',
		150: 'Message rate too high',
		151: 'Quota exceeded',
		152: 'Administrative action',
		153: 'Payload format invalid',
		154: 'Retain not supported',
		155: 'QoS not supported',
		156: 'Use another server',
		157: 'Server moved',
		158: 'Shared Subscriptions not supported',
		159: 'Connection rate exceeded',
		160: 'Maximum connect time',
		161: 'Subscription Identifiers not supported',
		162: 'Wildcard Subscriptions not supported'
	}
	
	function defaultId () {
		return 'mqttjs_' + Math.random().toString(16).substr(2, 8)
	}
	
	function sendPacket (client, packet, cb) {
		client.emit('packetsend', packet)
	
		var result = mqttPacket.writeToStream(packet, client.stream, client.options)
	
		if (!result && cb) {
			client.stream.once('drain', cb)
		} else if (cb) {
			cb()
		}
	}
	
	function flush (queue) {
		if (queue) {
			Object.keys(queue).forEach(function (messageId) {
				if (typeof queue[messageId] === 'function') {
					queue[messageId](new Error('Connection closed'))
					delete queue[messageId]
				}
			})
		}
	}
	
	function storeAndSend (client, packet, cb, cbStorePut) {
		client.outgoingStore.put(packet, function storedPacket (err) {
			if (err) {
				return cb && cb(err)
			}
			cbStorePut()
			sendPacket(client, packet, cb)
		})
	}
	
	function nop () {}
	
	/**
	 * MqttClient constructor
	 *
	 * @param {Stream} stream - stream
	 * @param {Object} [options] - connection options
	 * (see Connection#connect)
	 */
	function MqttClient (streamBuilder, options) {
		var k
		var that = this
	
		if (!(this instanceof MqttClient)) {
			return new MqttClient(streamBuilder, options)
		}
	
		this.options = options || {}
	
		// Defaults
		for (k in defaultConnectOptions) {
			if (typeof this.options[k] === 'undefined') {
				this.options[k] = defaultConnectOptions[k]
			} else {
				this.options[k] = options[k]
			}
		}
	
		this.options.clientId = (typeof options.clientId === 'string') ? options.clientId : defaultId()
	
		this.options.customHandleAcks = (options.protocolVersion === 5 && options.customHandleAcks) ? options.customHandleAcks : function () { arguments[3](0) }
	
		this.streamBuilder = streamBuilder
	
		// Inflight message storages
		this.outgoingStore = options.outgoingStore || new Store()
		this.incomingStore = options.incomingStore || new Store()
	
		// Should QoS zero messages be queued when the connection is broken?
		this.queueQoSZero = options.queueQoSZero === undefined ? true : options.queueQoSZero
	
		// map of subscribed topics to support reconnection
		this._resubscribeTopics = {}
	
		// map of a subscribe messageId and a topic
		this.messageIdToTopic = {}
	
		// Ping timer, setup in _setupPingTimer
		this.pingTimer = null
		// Is the client connected?
		this.connected = false
		// Are we disconnecting?
		this.disconnecting = false
		// Packet queue
		this.queue = []
		// connack timer
		this.connackTimer = null
		// Reconnect timer
		this.reconnectTimer = null
		// Is processing store?
		this._storeProcessing = false
		// Packet Ids are put into the store during store processing
		this._packetIdsDuringStoreProcessing = {}
		/**
		 * MessageIDs starting with 1
		 * ensure that nextId is min. 1, see https://github.com/mqttjs/MQTT.js/issues/810
		 */
		this.nextId = Math.max(1, Math.floor(Math.random() * 65535))
	
		// Inflight callbacks
		this.outgoing = {}
	
		// True if connection is first time.
		this._firstConnection = true
	
		// Mark disconnected on stream close
		this.on('close', function () {
			this.connected = false
			clearTimeout(this.connackTimer)
		})
	
		// Send queued packets
		this.on('connect', function () {
			var queue = this.queue
	
			function deliver () {
				var entry = queue.shift()
				var packet = null
	
				if (!entry) {
					return
				}
	
				packet = entry.packet
	
				that._sendPacket(
					packet,
					function (err) {
						if (entry.cb) {
							entry.cb(err)
						}
						deliver()
					}
				)
			}
	
			deliver()
		})
	
		// Clear ping timer
		this.on('close', function () {
			if (that.pingTimer !== null) {
				that.pingTimer.clear()
				that.pingTimer = null
			}
		})
	
		// Setup reconnect timer on disconnect
		this.on('close', this._setupReconnect)
	
		events.EventEmitter.call(this)
	
		this._setupStream()
	}
	inherits(MqttClient, events.EventEmitter)
	
	/**
	 * setup the event handlers in the inner stream.
	 *
	 * @api private
	 */
	MqttClient.prototype._setupStream = function () {
		var connectPacket
		var that = this
		var writable = new Writable()
		var parser = mqttPacket.parser(this.options)
		var completeParse = null
		var packets = []
	
		this._clearReconnect()
	
		this.stream = this.streamBuilder(this)
	
		parser.on('packet', function (packet) {
			packets.push(packet)
		})
	
		function nextTickWork () {
			process.nextTick(work)
		}
	
		function work () {
			var packet = packets.shift()
			var done = completeParse
	
			if (packet) {
				that._handlePacket(packet, nextTickWork)
			} else {
				completeParse = null
				done()
			}
		}
	
		writable._write = function (buf, enc, done) {
			completeParse = done
			parser.parse(buf)
			work()
		}
	
		this.stream.pipe(writable)
	
		// Suppress connection errors
		this.stream.on('error', nop)
	
		// Echo stream close
		this.stream.on('close', function () {
			that.emit('close')
		})
	
		// Send a connect packet
		connectPacket = Object.create(this.options)
		connectPacket.cmd = 'connect'
		// avoid message queue
		sendPacket(this, connectPacket)
	
		// Echo connection errors
		parser.on('error', this.emit.bind(this, 'error'))
	
		// auth
		if (this.options.properties) {
			if (!this.options.properties.authenticationMethod && this.options.properties.authenticationData) {
				this.emit('error', new Error('Packet has no Authentication Method'))
				return this
			}
			if (this.options.properties.authenticationMethod && this.options.authPacket && typeof this.options.authPacket === 'object') {
				var authPacket = xtend({cmd: 'auth', reasonCode: 0}, this.options.authPacket)
				sendPacket(this, authPacket)
			}
		}
	
		// many drain listeners are needed for qos 1 callbacks if the connection is intermittent
		this.stream.setMaxListeners(1000)
	
		clearTimeout(this.connackTimer)
		this.connackTimer = setTimeout(function () {
			that._cleanUp(true)
		}, this.options.connectTimeout)
	}
	
	MqttClient.prototype._handlePacket = function (packet, done) {
		var options = this.options
	
		if (options.protocolVersion === 5 && options.properties && options.properties.maximumPacketSize && options.properties.maximumPacketSize < packet.length) {
			this.emit('error', new Error('exceeding packets size ' + packet.cmd))
			this.end({reasonCode: 149, properties: { reasonString: 'Maximum packet size was exceeded' }})
			return this
		}
	
		this.emit('packetreceive', packet)
	
		switch (packet.cmd) {
			case 'publish':
				this._handlePublish(packet, done)
				break
			case 'puback':
			case 'pubrec':
			case 'pubcomp':
			case 'suback':
			case 'unsuback':
				this._handleAck(packet)
				done()
				break
			case 'pubrel':
				this._handlePubrel(packet, done)
				break
			case 'connack':
				this._handleConnack(packet)
				done()
				break
			case 'pingresp':
				this._handlePingresp(packet)
				done()
				break
			default:
				// do nothing
				// maybe we should do an error handling
				// or just log it
				break
		}
	}
	
	MqttClient.prototype._checkDisconnecting = function (callback) {
		if (this.disconnecting) {
			if (callback) {
				callback(new Error('client disconnecting'))
			} else {
				this.emit('error', new Error('client disconnecting'))
			}
		}
		return this.disconnecting
	}
	
	/**
	 * publish - publish <message> to <topic>
	 *
	 * @param {String} topic - topic to publish to
	 * @param {String, Buffer} message - message to publish
	 * @param {Object} [opts] - publish options, includes:
	 *    {Number} qos - qos level to publish on
	 *    {Boolean} retain - whether or not to retain the message
	 *    {Boolean} dup - whether or not mark a message as duplicate
	 *    {Function} cbStorePut - function(){} called when message is put into `outgoingStore`
	 * @param {Function} [callback] - function(err){}
	 *    called when publish succeeds or fails
	 * @returns {MqttClient} this - for chaining
	 * @api public
	 *
	 * @example client.publish('topic', 'message');
	 * @example
	 *     client.publish('topic', 'message', {qos: 1, retain: true, dup: true});
	 * @example client.publish('topic', 'message', console.log);
	 */
	MqttClient.prototype.publish = function (topic, message, opts, callback) {
		var packet
		var options = this.options
	
		// .publish(topic, payload, cb);
		if (typeof opts === 'function') {
			callback = opts
			opts = null
		}
	
		// default opts
		var defaultOpts = {qos: 0, retain: false, dup: false}
		opts = xtend(defaultOpts, opts)
	
		if (this._checkDisconnecting(callback)) {
			return this
		}
	
		packet = {
			cmd: 'publish',
			topic: topic,
			payload: message,
			qos: opts.qos,
			retain: opts.retain,
			messageId: this._nextId(),
			dup: opts.dup
		}
	
		if (options.protocolVersion === 5) {
			packet.properties = opts.properties
			if ((!options.properties && packet.properties && packet.properties.topicAlias) || ((opts.properties && options.properties) &&
				((opts.properties.topicAlias && options.properties.topicAliasMaximum && opts.properties.topicAlias > options.properties.topicAliasMaximum) ||
					(!options.properties.topicAliasMaximum && opts.properties.topicAlias)))) {
				/*
				if we are don`t setup topic alias or
				topic alias maximum less than topic alias or
				server don`t give topic alias maximum,
				we are removing topic alias from packet
				*/
				delete packet.properties.topicAlias
			}
		}
	
		switch (opts.qos) {
			case 1:
			case 2:
				// Add to callbacks
				this.outgoing[packet.messageId] = callback || nop
				if (this._storeProcessing) {
					this._packetIdsDuringStoreProcessing[packet.messageId] = false
					this._storePacket(packet, undefined, opts.cbStorePut)
				} else {
					this._sendPacket(packet, undefined, opts.cbStorePut)
				}
				break
			default:
				if (this._storeProcessing) {
					this._storePacket(packet, callback, opts.cbStorePut)
				} else {
					this._sendPacket(packet, callback, opts.cbStorePut)
				}
				break
		}
	
		return this
	}
	
	/**
	 * subscribe - subscribe to <topic>
	 *
	 * @param {String, Array, Object} topic - topic(s) to subscribe to, supports objects in the form {'topic': qos}
	 * @param {Object} [opts] - optional subscription options, includes:
	 *    {Number} qos - subscribe qos level
	 * @param {Function} [callback] - function(err, granted){} where:
	 *    {Error} err - subscription error (none at the moment!)
	 *    {Array} granted - array of {topic: 't', qos: 0}
	 * @returns {MqttClient} this - for chaining
	 * @api public
	 * @example client.subscribe('topic');
	 * @example client.subscribe('topic', {qos: 1});
	 * @example client.subscribe({'topic': {qos: 0}, 'topic2': {qos: 1}}, console.log);
	 * @example client.subscribe('topic', console.log);
	 */
	MqttClient.prototype.subscribe = function () {
		var packet
		var args = new Array(arguments.length)
		for (var i = 0; i < arguments.length; i++) {
			args[i] = arguments[i]
		}
		var subs = []
		var obj = args.shift()
		var resubscribe = obj.resubscribe
		var callback = args.pop() || nop
		var opts = args.pop()
		var invalidTopic
		var that = this
		var version = this.options.protocolVersion
	
		delete obj.resubscribe
	
		if (typeof obj === 'string') {
			obj = [obj]
		}
	
		if (typeof callback !== 'function') {
			opts = callback
			callback = nop
		}
	
		invalidTopic = validations.validateTopics(obj)
		if (invalidTopic !== null) {
			setImmediate(callback, new Error('Invalid topic ' + invalidTopic))
			return this
		}
	
		if (this._checkDisconnecting(callback)) {
			return this
		}
	
		var defaultOpts = {
			qos: 0
		}
		if (version === 5) {
			defaultOpts.nl = false
			defaultOpts.rap = false
			defaultOpts.rh = 0
		}
		opts = xtend(defaultOpts, opts)
	
		if (Array.isArray(obj)) {
			obj.forEach(function (topic) {
				if (!that._resubscribeTopics.hasOwnProperty(topic) ||
					that._resubscribeTopics[topic].qos < opts.qos ||
						resubscribe) {
					var currentOpts = {
						topic: topic,
						qos: opts.qos
					}
					if (version === 5) {
						currentOpts.nl = opts.nl
						currentOpts.rap = opts.rap
						currentOpts.rh = opts.rh
					}
					subs.push(currentOpts)
				}
			})
		} else {
			Object
				.keys(obj)
				.forEach(function (k) {
					if (!that._resubscribeTopics.hasOwnProperty(k) ||
						that._resubscribeTopics[k].qos < obj[k].qos ||
							resubscribe) {
						var currentOpts = {
							topic: k,
							qos: obj[k].qos
						}
						if (version === 5) {
							currentOpts.nl = obj[k].nl
							currentOpts.rap = obj[k].rap
							currentOpts.rh = obj[k].rh
						}
						subs.push(currentOpts)
					}
				})
		}
	
		packet = {
			cmd: 'subscribe',
			subscriptions: subs,
			qos: 1,
			retain: false,
			dup: false,
			messageId: this._nextId()
		}
	
		if (opts.properties) {
			packet.properties = opts.properties
		}
	
		if (!subs.length) {
			callback(null, [])
			return
		}
	
		// subscriptions to resubscribe to in case of disconnect
		if (this.options.resubscribe) {
			var topics = []
			subs.forEach(function (sub) {
				if (that.options.reconnectPeriod > 0) {
					var topic = { qos: sub.qos }
					if (version === 5) {
						topic.nl = sub.nl || false
						topic.rap = sub.rap || false
						topic.rh = sub.rh || 0
					}
					that._resubscribeTopics[sub.topic] = topic
					topics.push(sub.topic)
				}
			})
			that.messageIdToTopic[packet.messageId] = topics
		}
	
		this.outgoing[packet.messageId] = function (err, packet) {
			if (!err) {
				var granted = packet.granted
				for (var i = 0; i < granted.length; i += 1) {
					subs[i].qos = granted[i]
				}
			}
	
			callback(err, subs)
		}
	
		this._sendPacket(packet)
	
		return this
	}
	
	/**
	 * unsubscribe - unsubscribe from topic(s)
	 *
	 * @param {String, Array} topic - topics to unsubscribe from
	 * @param {Object} [opts] - optional subscription options, includes:
	 *    {Object} properties - properties of unsubscribe packet
	 * @param {Function} [callback] - callback fired on unsuback
	 * @returns {MqttClient} this - for chaining
	 * @api public
	 * @example client.unsubscribe('topic');
	 * @example client.unsubscribe('topic', console.log);
	 */
	MqttClient.prototype.unsubscribe = function () {
		var packet = {
			cmd: 'unsubscribe',
			qos: 1,
			messageId: this._nextId()
		}
		var that = this
		var args = new Array(arguments.length)
		for (var i = 0; i < arguments.length; i++) {
			args[i] = arguments[i]
		}
		var topic = args.shift()
		var callback = args.pop() || nop
		var opts = args.pop()
	
		if (typeof topic === 'string') {
			topic = [topic]
		}
	
		if (typeof callback !== 'function') {
			opts = callback
			callback = nop
		}
	
		if (this._checkDisconnecting(callback)) {
			return this
		}
	
		if (typeof topic === 'string') {
			packet.unsubscriptions = [topic]
		} else if (typeof topic === 'object' && topic.length) {
			packet.unsubscriptions = topic
		}
	
		if (this.options.resubscribe) {
			packet.unsubscriptions.forEach(function (topic) {
				delete that._resubscribeTopics[topic]
			})
		}
	
		if (typeof opts === 'object' && opts.properties) {
			packet.properties = opts.properties
		}
	
		this.outgoing[packet.messageId] = callback
	
		this._sendPacket(packet)
	
		return this
	}
	
	/**
	 * end - close connection
	 *
	 * @returns {MqttClient} this - for chaining
	 * @param {Boolean} force - do not wait for all in-flight messages to be acked
	 * @param {Function} cb - called when the client has been closed
	 *
	 * @api public
	 */
	MqttClient.prototype.end = function () {
		var that = this
	
		var force = arguments[0]
		var opts = arguments[1]
		var cb = arguments[2]
	
		if (force == null || typeof force !== 'boolean') {
			cb = opts || nop
			opts = force
			force = false
			if (typeof opts !== 'object') {
				cb = opts
				opts = null
				if (typeof cb !== 'function') {
					cb = nop
				}
			}
		}
	
		if (typeof opts !== 'object') {
			cb = opts
			opts = null
		}
	
		cb = cb || nop
	
		function closeStores () {
			that.disconnected = true
			that.incomingStore.close(function () {
				that.outgoingStore.close(function () {
					if (cb) {
						cb.apply(null, arguments)
					}
					that.emit('end')
				})
			})
			if (that._deferredReconnect) {
				that._deferredReconnect()
			}
		}
	
		function finish () {
			// defer closesStores of an I/O cycle,
			// just to make sure things are
			// ok for websockets
			that._cleanUp(force, setImmediate.bind(null, closeStores), opts)
		}
	
		if (this.disconnecting) {
			return this
		}
	
		this._clearReconnect()
	
		this.disconnecting = true
	
		if (!force && Object.keys(this.outgoing).length > 0) {
			// wait 10ms, just to be sure we received all of it
			this.once('outgoingEmpty', setTimeout.bind(null, finish, 10))
		} else {
			finish()
		}
	
		return this
	}
	
	/**
	 * removeOutgoingMessage - remove a message in outgoing store
	 * the outgoing callback will be called withe Error('Message removed') if the message is removed
	 *
	 * @param {Number} mid - messageId to remove message
	 * @returns {MqttClient} this - for chaining
	 * @api public
	 *
	 * @example client.removeOutgoingMessage(client.getLastMessageId());
	 */
	MqttClient.prototype.removeOutgoingMessage = function (mid) {
		var cb = this.outgoing[mid]
		delete this.outgoing[mid]
		this.outgoingStore.del({messageId: mid}, function () {
			cb(new Error('Message removed'))
		})
		return this
	}
	
	/**
	 * reconnect - connect again using the same options as connect()
	 *
	 * @param {Object} [opts] - optional reconnect options, includes:
	 *    {Store} incomingStore - a store for the incoming packets
	 *    {Store} outgoingStore - a store for the outgoing packets
	 *    if opts is not given, current stores are used
	 * @returns {MqttClient} this - for chaining
	 *
	 * @api public
	 */
	MqttClient.prototype.reconnect = function (opts) {
		var that = this
		var f = function () {
			if (opts) {
				that.options.incomingStore = opts.incomingStore
				that.options.outgoingStore = opts.outgoingStore
			} else {
				that.options.incomingStore = null
				that.options.outgoingStore = null
			}
			that.incomingStore = that.options.incomingStore || new Store()
			that.outgoingStore = that.options.outgoingStore || new Store()
			that.disconnecting = false
			that.disconnected = false
			that._deferredReconnect = null
			that._reconnect()
		}
	
		if (this.disconnecting && !this.disconnected) {
			this._deferredReconnect = f
		} else {
			f()
		}
		return this
	}
	
	/**
	 * _reconnect - implement reconnection
	 * @api privateish
	 */
	MqttClient.prototype._reconnect = function () {
		this.emit('reconnect')
		this._setupStream()
	}
	
	/**
	 * _setupReconnect - setup reconnect timer
	 */
	MqttClient.prototype._setupReconnect = function () {
		var that = this
	
		if (!that.disconnecting && !that.reconnectTimer && (that.options.reconnectPeriod > 0)) {
			if (!this.reconnecting) {
				this.emit('offline')
				this.reconnecting = true
			}
			that.reconnectTimer = setInterval(function () {
				that._reconnect()
			}, that.options.reconnectPeriod)
		}
	}
	
	/**
	 * _clearReconnect - clear the reconnect timer
	 */
	MqttClient.prototype._clearReconnect = function () {
		if (this.reconnectTimer) {
			clearInterval(this.reconnectTimer)
			this.reconnectTimer = null
		}
	}
	
	/**
	 * _cleanUp - clean up on connection end
	 * @api private
	 */
	MqttClient.prototype._cleanUp = function (forced, done) {
		var opts = arguments[2]
		if (done) {
			this.stream.on('close', done)
		}
	
		if (forced) {
			if ((this.options.reconnectPeriod === 0) && this.options.clean) {
				flush(this.outgoing)
			}
			this.stream.destroy()
		} else {
			var packet = xtend({ cmd: 'disconnect' }, opts)
			this._sendPacket(
				packet,
				setImmediate.bind(
					null,
					this.stream.end.bind(this.stream)
				)
			)
		}
	
		if (!this.disconnecting) {
			this._clearReconnect()
			this._setupReconnect()
		}
	
		if (this.pingTimer !== null) {
			this.pingTimer.clear()
			this.pingTimer = null
		}
	
		if (done && !this.connected) {
			this.stream.removeListener('close', done)
			done()
		}
	}
	
	/**
	 * _sendPacket - send or queue a packet
	 * @param {String} type - packet type (see `protocol`)
	 * @param {Object} packet - packet options
	 * @param {Function} cb - callback when the packet is sent
	 * @param {Function} cbStorePut - called when message is put into outgoingStore
	 * @api private
	 */
	MqttClient.prototype._sendPacket = function (packet, cb, cbStorePut) {
		cbStorePut = cbStorePut || nop
	
		if (!this.connected) {
			this._storePacket(packet, cb, cbStorePut)
			return
		}
	
		// When sending a packet, reschedule the ping timer
		this._shiftPingInterval()
	
		switch (packet.cmd) {
			case 'publish':
				break
			case 'pubrel':
				storeAndSend(this, packet, cb, cbStorePut)
				return
			default:
				sendPacket(this, packet, cb)
				return
		}
	
		switch (packet.qos) {
			case 2:
			case 1:
				storeAndSend(this, packet, cb, cbStorePut)
				break
			/**
			 * no need of case here since it will be caught by default
			 * and jshint comply that before default it must be a break
			 * anyway it will result in -1 evaluation
			 */
			case 0:
				/* falls through */
			default:
				sendPacket(this, packet, cb)
				break
		}
	}
	
	/**
	 * _storePacket - queue a packet
	 * @param {String} type - packet type (see `protocol`)
	 * @param {Object} packet - packet options
	 * @param {Function} cb - callback when the packet is sent
	 * @param {Function} cbStorePut - called when message is put into outgoingStore
	 * @api private
	 */
	MqttClient.prototype._storePacket = function (packet, cb, cbStorePut) {
		cbStorePut = cbStorePut || nop
	
		if (((packet.qos || 0) === 0 && this.queueQoSZero) || packet.cmd !== 'publish') {
			this.queue.push({ packet: packet, cb: cb })
		} else if (packet.qos > 0) {
			cb = this.outgoing[packet.messageId]
			this.outgoingStore.put(packet, function (err) {
				if (err) {
					return cb && cb(err)
				}
				cbStorePut()
			})
		} else if (cb) {
			cb(new Error('No connection to broker'))
		}
	}
	
	/**
	 * _setupPingTimer - setup the ping timer
	 *
	 * @api private
	 */
	MqttClient.prototype._setupPingTimer = function () {
		var that = this
	
		if (!this.pingTimer && this.options.keepalive) {
			this.pingResp = true
			this.pingTimer = reInterval(function () {
				that._checkPing()
			}, this.options.keepalive * 1000)
		}
	}
	
	/**
	 * _shiftPingInterval - reschedule the ping interval
	 *
	 * @api private
	 */
	MqttClient.prototype._shiftPingInterval = function () {
		if (this.pingTimer && this.options.keepalive && this.options.reschedulePings) {
			this.pingTimer.reschedule(this.options.keepalive * 1000)
		}
	}
	/**
	 * _checkPing - check if a pingresp has come back, and ping the server again
	 *
	 * @api private
	 */
	MqttClient.prototype._checkPing = function () {
		if (this.pingResp) {
			this.pingResp = false
			this._sendPacket({ cmd: 'pingreq' })
		} else {
			// do a forced cleanup since socket will be in bad shape
			this._cleanUp(true)
		}
	}
	
	/**
	 * _handlePingresp - handle a pingresp
	 *
	 * @api private
	 */
	MqttClient.prototype._handlePingresp = function () {
		this.pingResp = true
	}
	
	/**
	 * _handleConnack
	 *
	 * @param {Object} packet
	 * @api private
	 */
	
	MqttClient.prototype._handleConnack = function (packet) {
		var options = this.options
		var version = options.protocolVersion
		var rc = version === 5 ? packet.reasonCode : packet.returnCode
	
		clearTimeout(this.connackTimer)
	
		if (packet.properties) {
			if (packet.properties.topicAliasMaximum) {
				if (!options.properties) { options.properties = {} }
				options.properties.topicAliasMaximum = packet.properties.topicAliasMaximum
			}
			if (packet.properties.serverKeepAlive && options.keepalive) {
				options.keepalive = packet.properties.serverKeepAlive
				this._shiftPingInterval()
			}
			if (packet.properties.maximumPacketSize) {
				if (!options.properties) { options.properties = {} }
				options.properties.maximumPacketSize = packet.properties.maximumPacketSize
			}
		}
	
		if (rc === 0) {
			this.reconnecting = false
			this._onConnect(packet)
		} else if (rc > 0) {
			var err = new Error('Connection refused: ' + errors[rc])
			err.code = rc
			this.emit('error', err)
		}
	}
	
	/**
	 * _handlePublish
	 *
	 * @param {Object} packet
	 * @api private
	 */
	/*
	those late 2 case should be rewrite to comply with coding style:
	
	case 1:
	case 0:
		// do not wait sending a puback
		// no callback passed
		if (1 === qos) {
			this._sendPacket({
				cmd: 'puback',
				messageId: mid
			});
		}
		// emit the message event for both qos 1 and 0
		this.emit('message', topic, message, packet);
		this.handleMessage(packet, done);
		break;
	default:
		// do nothing but every switch mus have a default
		// log or throw an error about unknown qos
		break;
	
	for now i just suppressed the warnings
	*/
	MqttClient.prototype._handlePublish = function (packet, done) {
		done = typeof done !== 'undefined' ? done : nop
		var topic = packet.topic.toString()
		var message = packet.payload
		var qos = packet.qos
		var mid = packet.messageId
		var that = this
		var options = this.options
		var validReasonCodes = [0, 16, 128, 131, 135, 144, 145, 151, 153]
	
		switch (qos) {
			case 2: {
				options.customHandleAcks(topic, message, packet, function (error, code) {
					if (!(error instanceof Error)) {
						code = error
						error = null
					}
					if (error) { return that.emit('error', error) }
					if (validReasonCodes.indexOf(code) === -1) { return that.emit('error', new Error('Wrong reason code for pubrec')) }
					if (code) {
						that._sendPacket({cmd: 'pubrec', messageId: mid, reasonCode: code}, done)
					} else {
						that.incomingStore.put(packet, function () {
							that._sendPacket({cmd: 'pubrec', messageId: mid}, done)
						})
					}
				})
				break
			}
			case 1: {
				// emit the message event
				options.customHandleAcks(topic, message, packet, function (error, code) {
					if (!(error instanceof Error)) {
						code = error
						error = null
					}
					if (error) { return that.emit('error', error) }
					if (validReasonCodes.indexOf(code) === -1) { return that.emit('error', new Error('Wrong reason code for puback')) }
					if (!code) { that.emit('message', topic, message, packet) }
					that.handleMessage(packet, function (err) {
						if (err) {
							return done && done(err)
						}
						that._sendPacket({cmd: 'puback', messageId: mid, reasonCode: code}, done)
					})
				})
				break
			}
			case 0:
				// emit the message event
				this.emit('message', topic, message, packet)
				this.handleMessage(packet, done)
				break
			default:
				// do nothing
				// log or throw an error about unknown qos
				break
		}
	}
	
	/**
	 * Handle messages with backpressure support, one at a time.
	 * Override at will.
	 *
	 * @param Packet packet the packet
	 * @param Function callback call when finished
	 * @api public
	 */
	MqttClient.prototype.handleMessage = function (packet, callback) {
		callback()
	}
	
	/**
	 * _handleAck
	 *
	 * @param {Object} packet
	 * @api private
	 */
	
	MqttClient.prototype._handleAck = function (packet) {
		/* eslint no-fallthrough: "off" */
		var mid = packet.messageId
		var type = packet.cmd
		var response = null
		var cb = this.outgoing[mid]
		var that = this
		var err
	
		if (!cb) {
			// Server sent an ack in error, ignore it.
			return
		}
	
		// Process
		switch (type) {
			case 'pubcomp':
				// same thing as puback for QoS 2
			case 'puback':
				var pubackRC = packet.reasonCode
				// Callback - we're done
				if (pubackRC && pubackRC > 0 && pubackRC !== 16) {
					err = new Error('Publish error: ' + errors[pubackRC])
					err.code = pubackRC
					cb(err, packet)
				}
				delete this.outgoing[mid]
				this.outgoingStore.del(packet, cb)
				break
			case 'pubrec':
				response = {
					cmd: 'pubrel',
					qos: 2,
					messageId: mid
				}
				var pubrecRC = packet.reasonCode
	
				if (pubrecRC && pubrecRC > 0 && pubrecRC !== 16) {
					err = new Error('Publish error: ' + errors[pubrecRC])
					err.code = pubrecRC
					cb(err, packet)
				} else {
					this._sendPacket(response)
				}
				break
			case 'suback':
				delete this.outgoing[mid]
				for (var grantedI = 0; grantedI < packet.granted.length; grantedI++) {
					if ((packet.granted[grantedI] & 0x80) !== 0) {
						// suback with Failure status
						var topics = this.messageIdToTopic[mid]
						if (topics) {
							topics.forEach(function (topic) {
								delete that._resubscribeTopics[topic]
							})
						}
					}
				}
				cb(null, packet)
				break
			case 'unsuback':
				delete this.outgoing[mid]
				cb(null)
				break
			default:
				that.emit('error', new Error('unrecognized packet type'))
		}
	
		if (this.disconnecting &&
				Object.keys(this.outgoing).length === 0) {
			this.emit('outgoingEmpty')
		}
	}
	
	/**
	 * _handlePubrel
	 *
	 * @param {Object} packet
	 * @api private
	 */
	MqttClient.prototype._handlePubrel = function (packet, callback) {
		callback = typeof callback !== 'undefined' ? callback : nop
		var mid = packet.messageId
		var that = this
	
		var comp = {cmd: 'pubcomp', messageId: mid}
	
		that.incomingStore.get(packet, function (err, pub) {
			if (!err) {
				that.emit('message', pub.topic, pub.payload, pub)
				that.handleMessage(pub, function (err) {
					if (err) {
						return callback(err)
					}
					that.incomingStore.del(pub, nop)
					that._sendPacket(comp, callback)
				})
			} else {
				that._sendPacket(comp, callback)
			}
		})
	}
	
	/**
	 * _nextId
	 * @return unsigned int
	 */
	MqttClient.prototype._nextId = function () {
		// id becomes current state of this.nextId and increments afterwards
		var id = this.nextId++
		// Ensure 16 bit unsigned int (max 65535, nextId got one higher)
		if (this.nextId === 65536) {
			this.nextId = 1
		}
		return id
	}
	
	/**
	 * getLastMessageId
	 * @return unsigned int
	 */
	MqttClient.prototype.getLastMessageId = function () {
		return (this.nextId === 1) ? 65535 : (this.nextId - 1)
	}
	
	/**
	 * _resubscribe
	 * @api private
	 */
	MqttClient.prototype._resubscribe = function (connack) {
		if (!this._firstConnection &&
				(this.options.clean || (this.options.protocolVersion === 5 && !connack.sessionPresent)) &&
				Object.keys(this._resubscribeTopics).length > 0) {
			if (this.options.resubscribe) {
				this._resubscribeTopics.resubscribe = true
				this.subscribe(this._resubscribeTopics)
			} else {
				this._resubscribeTopics = {}
			}
		}
	
		this._firstConnection = false
	}
	
	/**
	 * _onConnect
	 *
	 * @api private
	 */
	MqttClient.prototype._onConnect = function (packet) {
		if (this.disconnected) {
			this.emit('connect', packet)
			return
		}
	
		var that = this
	
		this._setupPingTimer()
		this._resubscribe(packet)
	
		this.connected = true
	
		function startStreamProcess () {
			var outStore = that.outgoingStore.createStream()
	
			function clearStoreProcessing () {
				that._storeProcessing = false
				that._packetIdsDuringStoreProcessing = {}
			}
	
			that.once('close', remove)
			outStore.on('error', function (err) {
				clearStoreProcessing()
				that.removeListener('close', remove)
				that.emit('error', err)
			})
	
			function remove () {
				outStore.destroy()
				outStore = null
				clearStoreProcessing()
			}
	
			function storeDeliver () {
				// edge case, we wrapped this twice
				if (!outStore) {
					return
				}
				that._storeProcessing = true
	
				var packet = outStore.read(1)
	
				var cb
	
				if (!packet) {
					// read when data is available in the future
					outStore.once('readable', storeDeliver)
					return
				}
	
				// Skip already processed store packets
				if (that._packetIdsDuringStoreProcessing[packet.messageId]) {
					storeDeliver()
					return
				}
	
				// Avoid unnecessary stream read operations when disconnected
				if (!that.disconnecting && !that.reconnectTimer) {
					cb = that.outgoing[packet.messageId]
					that.outgoing[packet.messageId] = function (err, status) {
						// Ensure that the original callback passed in to publish gets invoked
						if (cb) {
							cb(err, status)
						}
	
						storeDeliver()
					}
					that._packetIdsDuringStoreProcessing[packet.messageId] = true
					that._sendPacket(packet)
				} else if (outStore.destroy) {
					outStore.destroy()
				}
			}
	
			outStore.on('end', function () {
				var allProcessed = true
				for (var id in that._packetIdsDuringStoreProcessing) {
					if (!that._packetIdsDuringStoreProcessing[id]) {
						allProcessed = false
						break
					}
				}
				if (allProcessed) {
					clearStoreProcessing()
					that.removeListener('close', remove)
					that.emit('connect', packet)
				} else {
					startStreamProcess()
				}
			})
			storeDeliver()
		}
		// start flowing
		startStreamProcess()
	}
	
	module.exports = MqttClient
	
	}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
	},{"./store":7,"./validations":8,"_process":92,"events":13,"inherits":80,"mqtt-packet":84,"readable-stream":108,"reinterval":109,"xtend":121}],2:[function(require,module,exports){
	(function (Buffer){
	'use strict'
	
	var Transform = require('readable-stream').Transform
	var duplexify = require('duplexify')
	var base64 = require('base64-js')
	
	/* global FileReader */
	var my
	var proxy
	var stream
	var isInitialized = false
	
	function buildProxy () {
		var proxy = new Transform()
		proxy._write = function (chunk, encoding, next) {
			my.sendSocketMessage({
				data: chunk.buffer,
				success: function () {
					next()
				},
				fail: function () {
					next(new Error())
				}
			})
		}
		proxy._flush = function socketEnd (done) {
			my.closeSocket({
				success: function () {
					done()
				}
			})
		}
	
		return proxy
	}
	
	function setDefaultOpts (opts) {
		if (!opts.hostname) {
			opts.hostname = 'localhost'
		}
		if (!opts.path) {
			opts.path = '/'
		}
	
		if (!opts.wsOptions) {
			opts.wsOptions = {}
		}
	}
	
	function buildUrl (opts, client) {
		var protocol = opts.protocol === 'alis' ? 'wss' : 'ws'
		var url = protocol + '://' + opts.hostname + opts.path
		if (opts.port && opts.port !== 80 && opts.port !== 443) {
			url = protocol + '://' + opts.hostname + ':' + opts.port + opts.path
		}
		if (typeof (opts.transformWsUrl) === 'function') {
			url = opts.transformWsUrl(url, opts, client)
		}
		return url
	}
	
	function bindEventHandler () {
		if (isInitialized) return
	
		isInitialized = true
	
		my.onSocketOpen(function () {
			stream.setReadable(proxy)
			stream.setWritable(proxy)
			stream.emit('connect')
		})
	
		my.onSocketMessage(function (res) {
			if (typeof res.data === 'string') {
				var array = base64.toByteArray(res.data)
				var buffer = Buffer.from(array)
				proxy.push(buffer)
			} else {
				var reader = new FileReader()
				reader.addEventListener('load', function () {
					var data = reader.result
	
					if (data instanceof ArrayBuffer) data = Buffer.from(data)
					else data = Buffer.from(data, 'utf8')
					proxy.push(data)
				})
				reader.readAsArrayBuffer(res.data)
			}
		})
	
		my.onSocketClose(function () {
			stream.end()
			stream.destroy()
		})
	
		my.onSocketError(function (res) {
			stream.destroy(res)
		})
	}
	
	function buildStream (client, opts) {
		opts.hostname = opts.hostname || opts.host
	
		if (!opts.hostname) {
			throw new Error('Could not determine host. Specify host manually.')
		}
	
		var websocketSubProtocol =
			(opts.protocolId === 'MQIsdp') && (opts.protocolVersion === 3)
				? 'mqttv3.1'
				: 'mqtt'
	
		setDefaultOpts(opts)
	
		var url = buildUrl(opts, client)
		my = opts.my
		my.connectSocket({
			url: url,
			protocols: websocketSubProtocol
		})
	
		proxy = buildProxy()
		stream = duplexify.obj()
	
		bindEventHandler()
	
		return stream
	}
	
	module.exports = buildStream
	
	}).call(this,require("buffer").Buffer)
	},{"base64-js":10,"buffer":12,"duplexify":17,"readable-stream":108}],3:[function(require,module,exports){
	'use strict'
	var net = require('net')
	
	/*
		variables port and host can be removed since
		you have all required information in opts object
	*/
	function buildBuilder (client, opts) {
		var port, host
		opts.port = opts.port || 1883
		opts.hostname = opts.hostname || opts.host || 'localhost'
	
		port = opts.port
		host = opts.hostname
	
		return net.createConnection(port, host)
	}
	
	module.exports = buildBuilder
	
	},{"net":11}],4:[function(require,module,exports){
	'use strict'
	var tls = require('tls')
	
	function buildBuilder (mqttClient, opts) {
		var connection
		opts.port = opts.port || 8883
		opts.host = opts.hostname || opts.host || 'localhost'
	
		opts.rejectUnauthorized = opts.rejectUnauthorized !== false
	
		delete opts.path
	
		connection = tls.connect(opts)
		/* eslint no-use-before-define: [2, "nofunc"] */
		connection.on('secureConnect', function () {
			if (opts.rejectUnauthorized && !connection.authorized) {
				connection.emit('error', new Error('TLS not authorized'))
			} else {
				connection.removeListener('error', handleTLSerrors)
			}
		})
	
		function handleTLSerrors (err) {
			// How can I get verify this error is a tls error?
			if (opts.rejectUnauthorized) {
				mqttClient.emit('error', err)
			}
	
			// close this connection to match the behaviour of net
			// otherwise all we get is an error from the connection
			// and close event doesn't fire. This is a work around
			// to enable the reconnect code to work the same as with
			// net.createConnection
			connection.end()
		}
	
		connection.on('error', handleTLSerrors)
		return connection
	}
	
	module.exports = buildBuilder
	
	},{"tls":11}],5:[function(require,module,exports){
	(function (process){
	'use strict'
	
	var websocket = require('websocket-stream')
	var urlModule = require('url')
	var WSS_OPTIONS = [
		'rejectUnauthorized',
		'ca',
		'cert',
		'key',
		'pfx',
		'passphrase'
	]
	var IS_BROWSER = process.title === 'browser'
	
	function buildUrl (opts, client) {
		var url = opts.protocol + '://' + opts.hostname + ':' + opts.port + opts.path
		if (typeof (opts.transformWsUrl) === 'function') {
			url = opts.transformWsUrl(url, opts, client)
		}
		return url
	}
	
	function setDefaultOpts (opts) {
		if (!opts.hostname) {
			opts.hostname = 'localhost'
		}
		if (!opts.port) {
			if (opts.protocol === 'wss') {
				opts.port = 443
			} else {
				opts.port = 80
			}
		}
		if (!opts.path) {
			opts.path = '/'
		}
	
		if (!opts.wsOptions) {
			opts.wsOptions = {}
		}
		if (!IS_BROWSER && opts.protocol === 'wss') {
			// Add cert/key/ca etc options
			WSS_OPTIONS.forEach(function (prop) {
				if (opts.hasOwnProperty(prop) && !opts.wsOptions.hasOwnProperty(prop)) {
					opts.wsOptions[prop] = opts[prop]
				}
			})
		}
	}
	
	function createWebSocket (client, opts) {
		var websocketSubProtocol =
			(opts.protocolId === 'MQIsdp') && (opts.protocolVersion === 3)
				? 'mqttv3.1'
				: 'mqtt'
	
		setDefaultOpts(opts)
		var url = buildUrl(opts, client)
		return websocket(url, [websocketSubProtocol], opts.wsOptions)
	}
	
	function buildBuilder (client, opts) {
		return createWebSocket(client, opts)
	}
	
	function buildBuilderBrowser (client, opts) {
		if (!opts.hostname) {
			opts.hostname = opts.host
		}
	
		if (!opts.hostname) {
			// Throwing an error in a Web Worker if no `hostname` is given, because we
			// can not determine the `hostname` automatically.  If connecting to
			// localhost, please supply the `hostname` as an argument.
			if (typeof (document) === 'undefined') {
				throw new Error('Could not determine host. Specify host manually.')
			}
			var parsed = urlModule.parse(document.URL)
			opts.hostname = parsed.hostname
	
			if (!opts.port) {
				opts.port = parsed.port
			}
		}
		return createWebSocket(client, opts)
	}
	
	if (IS_BROWSER) {
		module.exports = buildBuilderBrowser
	} else {
		module.exports = buildBuilder
	}
	
	}).call(this,require('_process'))
	},{"_process":92,"url":113,"websocket-stream":118}],6:[function(require,module,exports){
	(function (process,Buffer){
	'use strict'
	
	var Transform = require('readable-stream').Transform
	var duplexify = require('duplexify')
	
	/* global wx */
	var socketTask
	var proxy
	var stream
	
	function buildProxy () {
		var proxy = new Transform()
		proxy._write = function (chunk, encoding, next) {
			socketTask.send({
				data: chunk.buffer,
				success: function () {
					next()
				},
				fail: function (errMsg) {
					next(new Error(errMsg))
				}
			})
		}
		proxy._flush = function socketEnd (done) {
			socketTask.close({
				success: function () {
					done()
				}
			})
		}
	
		return proxy
	}
	
	function setDefaultOpts (opts) {
		if (!opts.hostname) {
			opts.hostname = 'localhost'
		}
		if (!opts.path) {
			opts.path = '/'
		}
	
		if (!opts.wsOptions) {
			opts.wsOptions = {}
		}
	}
	
	function buildUrl (opts, client) {
		var protocol = opts.protocol === 'wxs' ? 'wss' : 'ws'
		var url = protocol + '://' + opts.hostname + opts.path
		if (opts.port && opts.port !== 80 && opts.port !== 443) {
			url = protocol + '://' + opts.hostname + ':' + opts.port + opts.path
		}
		if (typeof (opts.transformWsUrl) === 'function') {
			url = opts.transformWsUrl(url, opts, client)
		}
		return url
	}
	
	function bindEventHandler () {
		socketTask.onOpen(function () {
			stream.setReadable(proxy)
			stream.setWritable(proxy)
			stream.emit('connect')
		})
	
		socketTask.onMessage(function (res) {
			var data = res.data
	
			if (data instanceof ArrayBuffer) data = Buffer.from(data)
			else data = Buffer.from(data, 'utf8')
			proxy.push(data)
		})
	
		socketTask.onClose(function () {
			stream.end()
			stream.destroy()
		})
	
		socketTask.onError(function (res) {
			stream.destroy(new Error(res.errMsg))
		})
	}
	
	function buildStream (client, opts) {
		opts.hostname = opts.hostname || opts.host
	
		if (!opts.hostname) {
			throw new Error('Could not determine host. Specify host manually.')
		}
	
		var websocketSubProtocol =
			(opts.protocolId === 'MQIsdp') && (opts.protocolVersion === 3)
				? 'mqttv3.1'
				: 'mqtt'
	
		setDefaultOpts(opts)
	
		var url = buildUrl(opts, client)
		socketTask = wx.connectSocket({
			url: url,
			protocols: websocketSubProtocol
		})
	
		proxy = buildProxy()
		stream = duplexify.obj()
		stream._destroy = function (err, cb) {
			socketTask.close({
				success: function () {
					cb && cb(err)
				}
			})
		}
	
		var destroyRef = stream.destroy
		stream.destroy = function () {
			stream.destroy = destroyRef
	
			var self = this
			process.nextTick(function () {
				socketTask.close({
					fail: function () {
						self._destroy(new Error())
					}
				})
			})
		}.bind(stream)
	
		bindEventHandler()
	
		return stream
	}
	
	module.exports = buildStream
	
	}).call(this,require('_process'),require("buffer").Buffer)
	},{"_process":92,"buffer":12,"duplexify":17,"readable-stream":108}],7:[function(require,module,exports){
	(function (process){
	'use strict'
	
	/**
	 * Module dependencies
	 */
	var xtend = require('xtend')
	
	var Readable = require('readable-stream').Readable
	var streamsOpts = { objectMode: true }
	var defaultStoreOptions = {
		clean: true
	}
	
	/**
	 * es6-map can preserve insertion order even if ES version is older.
	 *
	 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map#Description
	 * It should be noted that a Map which is a map of an object, especially
	 * a dictionary of dictionaries, will only map to the object's insertion
	 * order. In ES2015 this is ordered for objects but for older versions of
	 * ES, this may be random and not ordered.
	 *
	 */
	var Map = require('es6-map')
	
	/**
	 * In-memory implementation of the message store
	 * This can actually be saved into files.
	 *
	 * @param {Object} [options] - store options
	 */
	function Store (options) {
		if (!(this instanceof Store)) {
			return new Store(options)
		}
	
		this.options = options || {}
	
		// Defaults
		this.options = xtend(defaultStoreOptions, options)
	
		this._inflights = new Map()
	}
	
	/**
	 * Adds a packet to the store, a packet is
	 * anything that has a messageId property.
	 *
	 */
	Store.prototype.put = function (packet, cb) {
		this._inflights.set(packet.messageId, packet)
	
		if (cb) {
			cb()
		}
	
		return this
	}
	
	/**
	 * Creates a stream with all the packets in the store
	 *
	 */
	Store.prototype.createStream = function () {
		var stream = new Readable(streamsOpts)
		var destroyed = false
		var values = []
		var i = 0
	
		this._inflights.forEach(function (value, key) {
			values.push(value)
		})
	
		stream._read = function () {
			if (!destroyed && i < values.length) {
				this.push(values[i++])
			} else {
				this.push(null)
			}
		}
	
		stream.destroy = function () {
			if (destroyed) {
				return
			}
	
			var self = this
	
			destroyed = true
	
			process.nextTick(function () {
				self.emit('close')
			})
		}
	
		return stream
	}
	
	/**
	 * deletes a packet from the store.
	 */
	Store.prototype.del = function (packet, cb) {
		packet = this._inflights.get(packet.messageId)
		if (packet) {
			this._inflights.delete(packet.messageId)
			cb(null, packet)
		} else if (cb) {
			cb(new Error('missing packet'))
		}
	
		return this
	}
	
	/**
	 * get a packet from the store.
	 */
	Store.prototype.get = function (packet, cb) {
		packet = this._inflights.get(packet.messageId)
		if (packet) {
			cb(null, packet)
		} else if (cb) {
			cb(new Error('missing packet'))
		}
	
		return this
	}
	
	/**
	 * Close the store
	 */
	Store.prototype.close = function (cb) {
		if (this.options.clean) {
			this._inflights = null
		}
		if (cb) {
			cb()
		}
	}
	
	module.exports = Store
	
	}).call(this,require('_process'))
	},{"_process":92,"es6-map":67,"readable-stream":108,"xtend":121}],8:[function(require,module,exports){
	'use strict'
	
	/**
	 * Validate a topic to see if it's valid or not.
	 * A topic is valid if it follow below rules:
	 * - Rule #1: If any part of the topic is not `+` or `#`, then it must not contain `+` and '#'
	 * - Rule #2: Part `#` must be located at the end of the mailbox
	 *
	 * @param {String} topic - A topic
	 * @returns {Boolean} If the topic is valid, returns true. Otherwise, returns false.
	 */
	function validateTopic (topic) {
		var parts = topic.split('/')
	
		for (var i = 0; i < parts.length; i++) {
			if (parts[i] === '+') {
				continue
			}
	
			if (parts[i] === '#') {
				// for Rule #2
				return i === parts.length - 1
			}
	
			if (parts[i].indexOf('+') !== -1 || parts[i].indexOf('#') !== -1) {
				return false
			}
		}
	
		return true
	}
	
	/**
	 * Validate an array of topics to see if any of them is valid or not
		* @param {Array} topics - Array of topics
	 * @returns {String} If the topics is valid, returns null. Otherwise, returns the invalid one
	 */
	function validateTopics (topics) {
		if (topics.length === 0) {
			return 'empty_topic_list'
		}
		for (var i = 0; i < topics.length; i++) {
			if (!validateTopic(topics[i])) {
				return topics[i]
			}
		}
		return null
	}
	
	module.exports = {
		validateTopics: validateTopics
	}
	
	},{}],9:[function(require,module,exports){
	(function (process){
	'use strict'
	
	var MqttClient = require('../client')
	var Store = require('../store')
	var url = require('url')
	var xtend = require('xtend')
	var protocols = {}
	
	if (process.title !== 'browser') {
		protocols.mqtt = require('./tcp')
		protocols.tcp = require('./tcp')
		protocols.ssl = require('./tls')
		protocols.tls = require('./tls')
		protocols.mqtts = require('./tls')
	} else {
		protocols.wx = require('./wx')
		protocols.wxs = require('./wx')
	
		protocols.ali = require('./ali')
		protocols.alis = require('./ali')
	}
	
	protocols.ws = require('./ws')
	protocols.wss = require('./ws')
	
	/**
	 * Parse the auth attribute and merge username and password in the options object.
	 *
	 * @param {Object} [opts] option object
	 */
	function parseAuthOptions (opts) {
		var matches
		if (opts.auth) {
			matches = opts.auth.match(/^(.+):(.+)$/)
			if (matches) {
				opts.username = matches[1]
				opts.password = matches[2]
			} else {
				opts.username = opts.auth
			}
		}
	}
	
	/**
	 * connect - connect to an MQTT broker.
	 *
	 * @param {String} [brokerUrl] - url of the broker, optional
	 * @param {Object} opts - see MqttClient#constructor
	 */
	function connect (brokerUrl, opts) {
		if ((typeof brokerUrl === 'object') && !opts) {
			opts = brokerUrl
			brokerUrl = null
		}
	
		opts = opts || {}
	
		if (brokerUrl) {
			var parsed = url.parse(brokerUrl, true)
			if (parsed.port != null) {
				parsed.port = Number(parsed.port)
			}
	
			opts = xtend(parsed, opts)
	
			if (opts.protocol === null) {
				throw new Error('Missing protocol')
			}
			opts.protocol = opts.protocol.replace(/:$/, '')
		}
	
		// merge in the auth options if supplied
		parseAuthOptions(opts)
	
		// support clientId passed in the query string of the url
		if (opts.query && typeof opts.query.clientId === 'string') {
			opts.clientId = opts.query.clientId
		}
	
		if (opts.cert && opts.key) {
			if (opts.protocol) {
				if (['mqtts', 'wss', 'wxs', 'alis'].indexOf(opts.protocol) === -1) {
					switch (opts.protocol) {
						case 'mqtt':
							opts.protocol = 'mqtts'
							break
						case 'ws':
							opts.protocol = 'wss'
							break
						case 'wx':
							opts.protocol = 'wxs'
							break
						case 'ali':
							opts.protocol = 'alis'
							break
						default:
							throw new Error('Unknown protocol for secure connection: "' + opts.protocol + '"!')
					}
				}
			} else {
				// don't know what protocol he want to use, mqtts or wss
				throw new Error('Missing secure protocol key')
			}
		}
	
		if (!protocols[opts.protocol]) {
			var isSecure = ['mqtts', 'wss'].indexOf(opts.protocol) !== -1
			opts.protocol = [
				'mqtt',
				'mqtts',
				'ws',
				'wss',
				'wx',
				'wxs',
				'ali',
				'alis'
			].filter(function (key, index) {
				if (isSecure && index % 2 === 0) {
					// Skip insecure protocols when requesting a secure one.
					return false
				}
				return (typeof protocols[key] === 'function')
			})[0]
		}
	
		if (opts.clean === false && !opts.clientId) {
			throw new Error('Missing clientId for unclean clients')
		}
	
		if (opts.protocol) {
			opts.defaultProtocol = opts.protocol
		}
	
		function wrapper (client) {
			if (opts.servers) {
				if (!client._reconnectCount || client._reconnectCount === opts.servers.length) {
					client._reconnectCount = 0
				}
	
				opts.host = opts.servers[client._reconnectCount].host
				opts.port = opts.servers[client._reconnectCount].port
				opts.protocol = (!opts.servers[client._reconnectCount].protocol ? opts.defaultProtocol : opts.servers[client._reconnectCount].protocol)
				opts.hostname = opts.host
	
				client._reconnectCount++
			}
	
			return protocols[opts.protocol](client, opts)
		}
	
		return new MqttClient(wrapper, opts)
	}
	
	module.exports = connect
	module.exports.connect = connect
	module.exports.MqttClient = MqttClient
	module.exports.Store = Store
	
	}).call(this,require('_process'))
	},{"../client":1,"../store":7,"./ali":2,"./tcp":3,"./tls":4,"./ws":5,"./wx":6,"_process":92,"url":113,"xtend":121}],10:[function(require,module,exports){
	'use strict'
	
	exports.byteLength = byteLength
	exports.toByteArray = toByteArray
	exports.fromByteArray = fromByteArray
	
	var lookup = []
	var revLookup = []
	var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array
	
	var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
	for (var i = 0, len = code.length; i < len; ++i) {
		lookup[i] = code[i]
		revLookup[code.charCodeAt(i)] = i
	}
	
	// Support decoding URL-safe base64 strings, as Node.js does.
	// See: https://en.wikipedia.org/wiki/Base64#URL_applications
	revLookup['-'.charCodeAt(0)] = 62
	revLookup['_'.charCodeAt(0)] = 63
	
	function getLens (b64) {
		var len = b64.length
	
		if (len % 4 > 0) {
			throw new Error('Invalid string. Length must be a multiple of 4')
		}
	
		// Trim off extra bytes after placeholder bytes are found
		// See: https://github.com/beatgammit/base64-js/issues/42
		var validLen = b64.indexOf('=')
		if (validLen === -1) validLen = len
	
		var placeHoldersLen = validLen === len
			? 0
			: 4 - (validLen % 4)
	
		return [validLen, placeHoldersLen]
	}
	
	// base64 is 4/3 + up to two characters of the original data
	function byteLength (b64) {
		var lens = getLens(b64)
		var validLen = lens[0]
		var placeHoldersLen = lens[1]
		return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
	}
	
	function _byteLength (b64, validLen, placeHoldersLen) {
		return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
	}
	
	function toByteArray (b64) {
		var tmp
		var lens = getLens(b64)
		var validLen = lens[0]
		var placeHoldersLen = lens[1]
	
		var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))
	
		var curByte = 0
	
		// if there are placeholders, only get up to the last complete 4 chars
		var len = placeHoldersLen > 0
			? validLen - 4
			: validLen
	
		for (var i = 0; i < len; i += 4) {
			tmp =
				(revLookup[b64.charCodeAt(i)] << 18) |
				(revLookup[b64.charCodeAt(i + 1)] << 12) |
				(revLookup[b64.charCodeAt(i + 2)] << 6) |
				revLookup[b64.charCodeAt(i + 3)]
			arr[curByte++] = (tmp >> 16) & 0xFF
			arr[curByte++] = (tmp >> 8) & 0xFF
			arr[curByte++] = tmp & 0xFF
		}
	
		if (placeHoldersLen === 2) {
			tmp =
				(revLookup[b64.charCodeAt(i)] << 2) |
				(revLookup[b64.charCodeAt(i + 1)] >> 4)
			arr[curByte++] = tmp & 0xFF
		}
	
		if (placeHoldersLen === 1) {
			tmp =
				(revLookup[b64.charCodeAt(i)] << 10) |
				(revLookup[b64.charCodeAt(i + 1)] << 4) |
				(revLookup[b64.charCodeAt(i + 2)] >> 2)
			arr[curByte++] = (tmp >> 8) & 0xFF
			arr[curByte++] = tmp & 0xFF
		}
	
		return arr
	}
	
	function tripletToBase64 (num) {
		return lookup[num >> 18 & 0x3F] +
			lookup[num >> 12 & 0x3F] +
			lookup[num >> 6 & 0x3F] +
			lookup[num & 0x3F]
	}
	
	function encodeChunk (uint8, start, end) {
		var tmp
		var output = []
		for (var i = start; i < end; i += 3) {
			tmp =
				((uint8[i] << 16) & 0xFF0000) +
				((uint8[i + 1] << 8) & 0xFF00) +
				(uint8[i + 2] & 0xFF)
			output.push(tripletToBase64(tmp))
		}
		return output.join('')
	}
	
	function fromByteArray (uint8) {
		var tmp
		var len = uint8.length
		var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes
		var parts = []
		var maxChunkLength = 16383 // must be multiple of 3
	
		// go through the array every three bytes, we'll deal with trailing stuff later
		for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
			parts.push(encodeChunk(
				uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)
			))
		}
	
		// pad the end with zeros, but make sure to not forget the extra bytes
		if (extraBytes === 1) {
			tmp = uint8[len - 1]
			parts.push(
				lookup[tmp >> 2] +
				lookup[(tmp << 4) & 0x3F] +
				'=='
			)
		} else if (extraBytes === 2) {
			tmp = (uint8[len - 2] << 8) + uint8[len - 1]
			parts.push(
				lookup[tmp >> 10] +
				lookup[(tmp >> 4) & 0x3F] +
				lookup[(tmp << 2) & 0x3F] +
				'='
			)
		}
	
		return parts.join('')
	}
	
	},{}],11:[function(require,module,exports){
	
	},{}],12:[function(require,module,exports){
	/*!
	 * The buffer module from node.js, for the browser.
	 *
	 * @author   Feross Aboukhadijeh <https://feross.org>
	 * @license  MIT
	 */
	/* eslint-disable no-proto */
	
	'use strict'
	
	var base64 = require('base64-js')
	var ieee754 = require('ieee754')
	
	exports.Buffer = Buffer
	exports.SlowBuffer = SlowBuffer
	exports.INSPECT_MAX_BYTES = 50
	
	var K_MAX_LENGTH = 0x7fffffff
	exports.kMaxLength = K_MAX_LENGTH
	
	/**
	 * If `Buffer.TYPED_ARRAY_SUPPORT`:
	 *   === true    Use Uint8Array implementation (fastest)
	 *   === false   Print warning and recommend using `buffer` v4.x which has an Object
	 *               implementation (most compatible, even IE6)
	 *
	 * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
	 * Opera 11.6+, iOS 4.2+.
	 *
	 * We report that the browser does not support typed arrays if the are not subclassable
	 * using __proto__. Firefox 4-29 lacks support for adding new properties to `Uint8Array`
	 * (See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438). IE 10 lacks support
	 * for __proto__ and has a buggy typed array implementation.
	 */
	Buffer.TYPED_ARRAY_SUPPORT = typedArraySupport()
	
	if (!Buffer.TYPED_ARRAY_SUPPORT && typeof console !== 'undefined' &&
			typeof console.error === 'function') {
		console.error(
			'This browser lacks typed array (Uint8Array) support which is required by ' +
			'`buffer` v5.x. Use `buffer` v4.x if you require old browser support.'
		)
	}
	
	function typedArraySupport () {
		// Can typed array instances can be augmented?
		try {
			var arr = new Uint8Array(1)
			arr.__proto__ = { __proto__: Uint8Array.prototype, foo: function () { return 42 } }
			return arr.foo() === 42
		} catch (e) {
			return false
		}
	}
	
	Object.defineProperty(Buffer.prototype, 'parent', {
		enumerable: true,
		get: function () {
			if (!Buffer.isBuffer(this)) return undefined
			return this.buffer
		}
	})
	
	Object.defineProperty(Buffer.prototype, 'offset', {
		enumerable: true,
		get: function () {
			if (!Buffer.isBuffer(this)) return undefined
			return this.byteOffset
		}
	})
	
	function createBuffer (length) {
		if (length > K_MAX_LENGTH) {
			throw new RangeError('The value "' + length + '" is invalid for option "size"')
		}
		// Return an augmented `Uint8Array` instance
		var buf = new Uint8Array(length)
		buf.__proto__ = Buffer.prototype
		return buf
	}
	
	/**
	 * The Buffer constructor returns instances of `Uint8Array` that have their
	 * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
	 * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
	 * and the `Uint8Array` methods. Square bracket notation works as expected -- it
	 * returns a single octet.
	 *
	 * The `Uint8Array` prototype remains unmodified.
	 */
	
	function Buffer (arg, encodingOrOffset, length) {
		// Common case.
		if (typeof arg === 'number') {
			if (typeof encodingOrOffset === 'string') {
				throw new TypeError(
					'The "string" argument must be of type string. Received type number'
				)
			}
			return allocUnsafe(arg)
		}
		return from(arg, encodingOrOffset, length)
	}
	
	// Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97
	if (typeof Symbol !== 'undefined' && Symbol.species != null &&
			Buffer[Symbol.species] === Buffer) {
		Object.defineProperty(Buffer, Symbol.species, {
			value: null,
			configurable: true,
			enumerable: false,
			writable: false
		})
	}
	
	Buffer.poolSize = 8192 // not used by this implementation
	
	function from (value, encodingOrOffset, length) {
		if (typeof value === 'string') {
			return fromString(value, encodingOrOffset)
		}
	
		if (ArrayBuffer.isView(value)) {
			return fromArrayLike(value)
		}
	
		if (value == null) {
			throw TypeError(
				'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
				'or Array-like Object. Received type ' + (typeof value)
			)
		}
	
		if (isInstance(value, ArrayBuffer) ||
				(value && isInstance(value.buffer, ArrayBuffer))) {
			return fromArrayBuffer(value, encodingOrOffset, length)
		}
	
		if (typeof value === 'number') {
			throw new TypeError(
				'The "value" argument must not be of type number. Received type number'
			)
		}
	
		var valueOf = value.valueOf && value.valueOf()
		if (valueOf != null && valueOf !== value) {
			return Buffer.from(valueOf, encodingOrOffset, length)
		}
	
		var b = fromObject(value)
		if (b) return b
	
		if (typeof Symbol !== 'undefined' && Symbol.toPrimitive != null &&
				typeof value[Symbol.toPrimitive] === 'function') {
			return Buffer.from(
				value[Symbol.toPrimitive]('string'), encodingOrOffset, length
			)
		}
	
		throw new TypeError(
			'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
			'or Array-like Object. Received type ' + (typeof value)
		)
	}
	
	/**
	 * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
	 * if value is a number.
	 * Buffer.from(str[, encoding])
	 * Buffer.from(array)
	 * Buffer.from(buffer)
	 * Buffer.from(arrayBuffer[, byteOffset[, length]])
	 **/
	Buffer.from = function (value, encodingOrOffset, length) {
		return from(value, encodingOrOffset, length)
	}
	
	// Note: Change prototype *after* Buffer.from is defined to workaround Chrome bug:
	// https://github.com/feross/buffer/pull/148
	Buffer.prototype.__proto__ = Uint8Array.prototype
	Buffer.__proto__ = Uint8Array
	
	function assertSize (size) {
		if (typeof size !== 'number') {
			throw new TypeError('"size" argument must be of type number')
		} else if (size < 0) {
			throw new RangeError('The value "' + size + '" is invalid for option "size"')
		}
	}
	
	function alloc (size, fill, encoding) {
		assertSize(size)
		if (size <= 0) {
			return createBuffer(size)
		}
		if (fill !== undefined) {
			// Only pay attention to encoding if it's a string. This
			// prevents accidentally sending in a number that would
			// be interpretted as a start offset.
			return typeof encoding === 'string'
				? createBuffer(size).fill(fill, encoding)
				: createBuffer(size).fill(fill)
		}
		return createBuffer(size)
	}
	
	/**
	 * Creates a new filled Buffer instance.
	 * alloc(size[, fill[, encoding]])
	 **/
	Buffer.alloc = function (size, fill, encoding) {
		return alloc(size, fill, encoding)
	}
	
	function allocUnsafe (size) {
		assertSize(size)
		return createBuffer(size < 0 ? 0 : checked(size) | 0)
	}
	
	/**
	 * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
	 * */
	Buffer.allocUnsafe = function (size) {
		return allocUnsafe(size)
	}
	/**
	 * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
	 */
	Buffer.allocUnsafeSlow = function (size) {
		return allocUnsafe(size)
	}
	
	function fromString (string, encoding) {
		if (typeof encoding !== 'string' || encoding === '') {
			encoding = 'utf8'
		}
	
		if (!Buffer.isEncoding(encoding)) {
			throw new TypeError('Unknown encoding: ' + encoding)
		}
	
		var length = byteLength(string, encoding) | 0
		var buf = createBuffer(length)
	
		var actual = buf.write(string, encoding)
	
		if (actual !== length) {
			// Writing a hex string, for example, that contains invalid characters will
			// cause everything after the first invalid character to be ignored. (e.g.
			// 'abxxcd' will be treated as 'ab')
			buf = buf.slice(0, actual)
		}
	
		return buf
	}
	
	function fromArrayLike (array) {
		var length = array.length < 0 ? 0 : checked(array.length) | 0
		var buf = createBuffer(length)
		for (var i = 0; i < length; i += 1) {
			buf[i] = array[i] & 255
		}
		return buf
	}
	
	function fromArrayBuffer (array, byteOffset, length) {
		if (byteOffset < 0 || array.byteLength < byteOffset) {
			throw new RangeError('"offset" is outside of buffer bounds')
		}
	
		if (array.byteLength < byteOffset + (length || 0)) {
			throw new RangeError('"length" is outside of buffer bounds')
		}
	
		var buf
		if (byteOffset === undefined && length === undefined) {
			buf = new Uint8Array(array)
		} else if (length === undefined) {
			buf = new Uint8Array(array, byteOffset)
		} else {
			buf = new Uint8Array(array, byteOffset, length)
		}
	
		// Return an augmented `Uint8Array` instance
		buf.__proto__ = Buffer.prototype
		return buf
	}
	
	function fromObject (obj) {
		if (Buffer.isBuffer(obj)) {
			var len = checked(obj.length) | 0
			var buf = createBuffer(len)
	
			if (buf.length === 0) {
				return buf
			}
	
			obj.copy(buf, 0, 0, len)
			return buf
		}
	
		if (obj.length !== undefined) {
			if (typeof obj.length !== 'number' || numberIsNaN(obj.length)) {
				return createBuffer(0)
			}
			return fromArrayLike(obj)
		}
	
		if (obj.type === 'Buffer' && Array.isArray(obj.data)) {
			return fromArrayLike(obj.data)
		}
	}
	
	function checked (length) {
		// Note: cannot use `length < K_MAX_LENGTH` here because that fails when
		// length is NaN (which is otherwise coerced to zero.)
		if (length >= K_MAX_LENGTH) {
			throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
													 'size: 0x' + K_MAX_LENGTH.toString(16) + ' bytes')
		}
		return length | 0
	}
	
	function SlowBuffer (length) {
		if (+length != length) { // eslint-disable-line eqeqeq
			length = 0
		}
		return Buffer.alloc(+length)
	}
	
	Buffer.isBuffer = function isBuffer (b) {
		return b != null && b._isBuffer === true &&
			b !== Buffer.prototype // so Buffer.isBuffer(Buffer.prototype) will be false
	}
	
	Buffer.compare = function compare (a, b) {
		if (isInstance(a, Uint8Array)) a = Buffer.from(a, a.offset, a.byteLength)
		if (isInstance(b, Uint8Array)) b = Buffer.from(b, b.offset, b.byteLength)
		if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
			throw new TypeError(
				'The "buf1", "buf2" arguments must be one of type Buffer or Uint8Array'
			)
		}
	
		if (a === b) return 0
	
		var x = a.length
		var y = b.length
	
		for (var i = 0, len = Math.min(x, y); i < len; ++i) {
			if (a[i] !== b[i]) {
				x = a[i]
				y = b[i]
				break
			}
		}
	
		if (x < y) return -1
		if (y < x) return 1
		return 0
	}
	
	Buffer.isEncoding = function isEncoding (encoding) {
		switch (String(encoding).toLowerCase()) {
			case 'hex':
			case 'utf8':
			case 'utf-8':
			case 'ascii':
			case 'latin1':
			case 'binary':
			case 'base64':
			case 'ucs2':
			case 'ucs-2':
			case 'utf16le':
			case 'utf-16le':
				return true
			default:
				return false
		}
	}
	
	Buffer.concat = function concat (list, length) {
		if (!Array.isArray(list)) {
			throw new TypeError('"list" argument must be an Array of Buffers')
		}
	
		if (list.length === 0) {
			return Buffer.alloc(0)
		}
	
		var i
		if (length === undefined) {
			length = 0
			for (i = 0; i < list.length; ++i) {
				length += list[i].length
			}
		}
	
		var buffer = Buffer.allocUnsafe(length)
		var pos = 0
		for (i = 0; i < list.length; ++i) {
			var buf = list[i]
			if (isInstance(buf, Uint8Array)) {
				buf = Buffer.from(buf)
			}
			if (!Buffer.isBuffer(buf)) {
				throw new TypeError('"list" argument must be an Array of Buffers')
			}
			buf.copy(buffer, pos)
			pos += buf.length
		}
		return buffer
	}
	
	function byteLength (string, encoding) {
		if (Buffer.isBuffer(string)) {
			return string.length
		}
		if (ArrayBuffer.isView(string) || isInstance(string, ArrayBuffer)) {
			return string.byteLength
		}
		if (typeof string !== 'string') {
			throw new TypeError(
				'The "string" argument must be one of type string, Buffer, or ArrayBuffer. ' +
				'Received type ' + typeof string
			)
		}
	
		var len = string.length
		var mustMatch = (arguments.length > 2 && arguments[2] === true)
		if (!mustMatch && len === 0) return 0
	
		// Use a for loop to avoid recursion
		var loweredCase = false
		for (;;) {
			switch (encoding) {
				case 'ascii':
				case 'latin1':
				case 'binary':
					return len
				case 'utf8':
				case 'utf-8':
					return utf8ToBytes(string).length
				case 'ucs2':
				case 'ucs-2':
				case 'utf16le':
				case 'utf-16le':
					return len * 2
				case 'hex':
					return len >>> 1
				case 'base64':
					return base64ToBytes(string).length
				default:
					if (loweredCase) {
						return mustMatch ? -1 : utf8ToBytes(string).length // assume utf8
					}
					encoding = ('' + encoding).toLowerCase()
					loweredCase = true
			}
		}
	}
	Buffer.byteLength = byteLength
	
	function slowToString (encoding, start, end) {
		var loweredCase = false
	
		// No need to verify that "this.length <= MAX_UINT32" since it's a read-only
		// property of a typed array.
	
		// This behaves neither like String nor Uint8Array in that we set start/end
		// to their upper/lower bounds if the value passed is out of range.
		// undefined is handled specially as per ECMA-262 6th Edition,
		// Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
		if (start === undefined || start < 0) {
			start = 0
		}
		// Return early if start > this.length. Done here to prevent potential uint32
		// coercion fail below.
		if (start > this.length) {
			return ''
		}
	
		if (end === undefined || end > this.length) {
			end = this.length
		}
	
		if (end <= 0) {
			return ''
		}
	
		// Force coersion to uint32. This will also coerce falsey/NaN values to 0.
		end >>>= 0
		start >>>= 0
	
		if (end <= start) {
			return ''
		}
	
		if (!encoding) encoding = 'utf8'
	
		while (true) {
			switch (encoding) {
				case 'hex':
					return hexSlice(this, start, end)
	
				case 'utf8':
				case 'utf-8':
					return utf8Slice(this, start, end)
	
				case 'ascii':
					return asciiSlice(this, start, end)
	
				case 'latin1':
				case 'binary':
					return latin1Slice(this, start, end)
	
				case 'base64':
					return base64Slice(this, start, end)
	
				case 'ucs2':
				case 'ucs-2':
				case 'utf16le':
				case 'utf-16le':
					return utf16leSlice(this, start, end)
	
				default:
					if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
					encoding = (encoding + '').toLowerCase()
					loweredCase = true
			}
		}
	}
	
	// This property is used by `Buffer.isBuffer` (and the `is-buffer` npm package)
	// to detect a Buffer instance. It's not possible to use `instanceof Buffer`
	// reliably in a browserify context because there could be multiple different
	// copies of the 'buffer' package in use. This method works even for Buffer
	// instances that were created from another copy of the `buffer` package.
	// See: https://github.com/feross/buffer/issues/154
	Buffer.prototype._isBuffer = true
	
	function swap (b, n, m) {
		var i = b[n]
		b[n] = b[m]
		b[m] = i
	}
	
	Buffer.prototype.swap16 = function swap16 () {
		var len = this.length
		if (len % 2 !== 0) {
			throw new RangeError('Buffer size must be a multiple of 16-bits')
		}
		for (var i = 0; i < len; i += 2) {
			swap(this, i, i + 1)
		}
		return this
	}
	
	Buffer.prototype.swap32 = function swap32 () {
		var len = this.length
		if (len % 4 !== 0) {
			throw new RangeError('Buffer size must be a multiple of 32-bits')
		}
		for (var i = 0; i < len; i += 4) {
			swap(this, i, i + 3)
			swap(this, i + 1, i + 2)
		}
		return this
	}
	
	Buffer.prototype.swap64 = function swap64 () {
		var len = this.length
		if (len % 8 !== 0) {
			throw new RangeError('Buffer size must be a multiple of 64-bits')
		}
		for (var i = 0; i < len; i += 8) {
			swap(this, i, i + 7)
			swap(this, i + 1, i + 6)
			swap(this, i + 2, i + 5)
			swap(this, i + 3, i + 4)
		}
		return this
	}
	
	Buffer.prototype.toString = function toString () {
		var length = this.length
		if (length === 0) return ''
		if (arguments.length === 0) return utf8Slice(this, 0, length)
		return slowToString.apply(this, arguments)
	}
	
	Buffer.prototype.toLocaleString = Buffer.prototype.toString
	
	Buffer.prototype.equals = function equals (b) {
		if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
		if (this === b) return true
		return Buffer.compare(this, b) === 0
	}
	
	Buffer.prototype.inspect = function inspect () {
		var str = ''
		var max = exports.INSPECT_MAX_BYTES
		str = this.toString('hex', 0, max).replace(/(.{2})/g, '$1 ').trim()
		if (this.length > max) str += ' ... '
		return '<Buffer ' + str + '>'
	}
	
	Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
		if (isInstance(target, Uint8Array)) {
			target = Buffer.from(target, target.offset, target.byteLength)
		}
		if (!Buffer.isBuffer(target)) {
			throw new TypeError(
				'The "target" argument must be one of type Buffer or Uint8Array. ' +
				'Received type ' + (typeof target)
			)
		}
	
		if (start === undefined) {
			start = 0
		}
		if (end === undefined) {
			end = target ? target.length : 0
		}
		if (thisStart === undefined) {
			thisStart = 0
		}
		if (thisEnd === undefined) {
			thisEnd = this.length
		}
	
		if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
			throw new RangeError('out of range index')
		}
	
		if (thisStart >= thisEnd && start >= end) {
			return 0
		}
		if (thisStart >= thisEnd) {
			return -1
		}
		if (start >= end) {
			return 1
		}
	
		start >>>= 0
		end >>>= 0
		thisStart >>>= 0
		thisEnd >>>= 0
	
		if (this === target) return 0
	
		var x = thisEnd - thisStart
		var y = end - start
		var len = Math.min(x, y)
	
		var thisCopy = this.slice(thisStart, thisEnd)
		var targetCopy = target.slice(start, end)
	
		for (var i = 0; i < len; ++i) {
			if (thisCopy[i] !== targetCopy[i]) {
				x = thisCopy[i]
				y = targetCopy[i]
				break
			}
		}
	
		if (x < y) return -1
		if (y < x) return 1
		return 0
	}
	
	// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
	// OR the last index of `val` in `buffer` at offset <= `byteOffset`.
	//
	// Arguments:
	// - buffer - a Buffer to search
	// - val - a string, Buffer, or number
	// - byteOffset - an index into `buffer`; will be clamped to an int32
	// - encoding - an optional encoding, relevant is val is a string
	// - dir - true for indexOf, false for lastIndexOf
	function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {
		// Empty buffer means no match
		if (buffer.length === 0) return -1
	
		// Normalize byteOffset
		if (typeof byteOffset === 'string') {
			encoding = byteOffset
			byteOffset = 0
		} else if (byteOffset > 0x7fffffff) {
			byteOffset = 0x7fffffff
		} else if (byteOffset < -0x80000000) {
			byteOffset = -0x80000000
		}
		byteOffset = +byteOffset // Coerce to Number.
		if (numberIsNaN(byteOffset)) {
			// byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer
			byteOffset = dir ? 0 : (buffer.length - 1)
		}
	
		// Normalize byteOffset: negative offsets start from the end of the buffer
		if (byteOffset < 0) byteOffset = buffer.length + byteOffset
		if (byteOffset >= buffer.length) {
			if (dir) return -1
			else byteOffset = buffer.length - 1
		} else if (byteOffset < 0) {
			if (dir) byteOffset = 0
			else return -1
		}
	
		// Normalize val
		if (typeof val === 'string') {
			val = Buffer.from(val, encoding)
		}
	
		// Finally, search either indexOf (if dir is true) or lastIndexOf
		if (Buffer.isBuffer(val)) {
			// Special case: looking for empty string/buffer always fails
			if (val.length === 0) {
				return -1
			}
			return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
		} else if (typeof val === 'number') {
			val = val & 0xFF // Search for a byte value [0-255]
			if (typeof Uint8Array.prototype.indexOf === 'function') {
				if (dir) {
					return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
				} else {
					return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
				}
			}
			return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)
		}
	
		throw new TypeError('val must be string, number or Buffer')
	}
	
	function arrayIndexOf (arr, val, byteOffset, encoding, dir) {
		var indexSize = 1
		var arrLength = arr.length
		var valLength = val.length
	
		if (encoding !== undefined) {
			encoding = String(encoding).toLowerCase()
			if (encoding === 'ucs2' || encoding === 'ucs-2' ||
					encoding === 'utf16le' || encoding === 'utf-16le') {
				if (arr.length < 2 || val.length < 2) {
					return -1
				}
				indexSize = 2
				arrLength /= 2
				valLength /= 2
				byteOffset /= 2
			}
		}
	
		function read (buf, i) {
			if (indexSize === 1) {
				return buf[i]
			} else {
				return buf.readUInt16BE(i * indexSize)
			}
		}
	
		var i
		if (dir) {
			var foundIndex = -1
			for (i = byteOffset; i < arrLength; i++) {
				if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
					if (foundIndex === -1) foundIndex = i
					if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
				} else {
					if (foundIndex !== -1) i -= i - foundIndex
					foundIndex = -1
				}
			}
		} else {
			if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength
			for (i = byteOffset; i >= 0; i--) {
				var found = true
				for (var j = 0; j < valLength; j++) {
					if (read(arr, i + j) !== read(val, j)) {
						found = false
						break
					}
				}
				if (found) return i
			}
		}
	
		return -1
	}
	
	Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
		return this.indexOf(val, byteOffset, encoding) !== -1
	}
	
	Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
		return bidirectionalIndexOf(this, val, byteOffset, encoding, true)
	}
	
	Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {
		return bidirectionalIndexOf(this, val, byteOffset, encoding, false)
	}
	
	function hexWrite (buf, string, offset, length) {
		offset = Number(offset) || 0
		var remaining = buf.length - offset
		if (!length) {
			length = remaining
		} else {
			length = Number(length)
			if (length > remaining) {
				length = remaining
			}
		}
	
		var strLen = string.length
	
		if (length > strLen / 2) {
			length = strLen / 2
		}
		for (var i = 0; i < length; ++i) {
			var parsed = parseInt(string.substr(i * 2, 2), 16)
			if (numberIsNaN(parsed)) return i
			buf[offset + i] = parsed
		}
		return i
	}
	
	function utf8Write (buf, string, offset, length) {
		return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
	}
	
	function asciiWrite (buf, string, offset, length) {
		return blitBuffer(asciiToBytes(string), buf, offset, length)
	}
	
	function latin1Write (buf, string, offset, length) {
		return asciiWrite(buf, string, offset, length)
	}
	
	function base64Write (buf, string, offset, length) {
		return blitBuffer(base64ToBytes(string), buf, offset, length)
	}
	
	function ucs2Write (buf, string, offset, length) {
		return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
	}
	
	Buffer.prototype.write = function write (string, offset, length, encoding) {
		// Buffer#write(string)
		if (offset === undefined) {
			encoding = 'utf8'
			length = this.length
			offset = 0
		// Buffer#write(string, encoding)
		} else if (length === undefined && typeof offset === 'string') {
			encoding = offset
			length = this.length
			offset = 0
		// Buffer#write(string, offset[, length][, encoding])
		} else if (isFinite(offset)) {
			offset = offset >>> 0
			if (isFinite(length)) {
				length = length >>> 0
				if (encoding === undefined) encoding = 'utf8'
			} else {
				encoding = length
				length = undefined
			}
		} else {
			throw new Error(
				'Buffer.write(string, encoding, offset[, length]) is no longer supported'
			)
		}
	
		var remaining = this.length - offset
		if (length === undefined || length > remaining) length = remaining
	
		if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
			throw new RangeError('Attempt to write outside buffer bounds')
		}
	
		if (!encoding) encoding = 'utf8'
	
		var loweredCase = false
		for (;;) {
			switch (encoding) {
				case 'hex':
					return hexWrite(this, string, offset, length)
	
				case 'utf8':
				case 'utf-8':
					return utf8Write(this, string, offset, length)
	
				case 'ascii':
					return asciiWrite(this, string, offset, length)
	
				case 'latin1':
				case 'binary':
					return latin1Write(this, string, offset, length)
	
				case 'base64':
					// Warning: maxLength not taken into account in base64Write
					return base64Write(this, string, offset, length)
	
				case 'ucs2':
				case 'ucs-2':
				case 'utf16le':
				case 'utf-16le':
					return ucs2Write(this, string, offset, length)
	
				default:
					if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
					encoding = ('' + encoding).toLowerCase()
					loweredCase = true
			}
		}
	}
	
	Buffer.prototype.toJSON = function toJSON () {
		return {
			type: 'Buffer',
			data: Array.prototype.slice.call(this._arr || this, 0)
		}
	}
	
	function base64Slice (buf, start, end) {
		if (start === 0 && end === buf.length) {
			return base64.fromByteArray(buf)
		} else {
			return base64.fromByteArray(buf.slice(start, end))
		}
	}
	
	function utf8Slice (buf, start, end) {
		end = Math.min(buf.length, end)
		var res = []
	
		var i = start
		while (i < end) {
			var firstByte = buf[i]
			var codePoint = null
			var bytesPerSequence = (firstByte > 0xEF) ? 4
				: (firstByte > 0xDF) ? 3
					: (firstByte > 0xBF) ? 2
						: 1
	
			if (i + bytesPerSequence <= end) {
				var secondByte, thirdByte, fourthByte, tempCodePoint
	
				switch (bytesPerSequence) {
					case 1:
						if (firstByte < 0x80) {
							codePoint = firstByte
						}
						break
					case 2:
						secondByte = buf[i + 1]
						if ((secondByte & 0xC0) === 0x80) {
							tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
							if (tempCodePoint > 0x7F) {
								codePoint = tempCodePoint
							}
						}
						break
					case 3:
						secondByte = buf[i + 1]
						thirdByte = buf[i + 2]
						if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
							tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
							if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
								codePoint = tempCodePoint
							}
						}
						break
					case 4:
						secondByte = buf[i + 1]
						thirdByte = buf[i + 2]
						fourthByte = buf[i + 3]
						if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
							tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
							if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
								codePoint = tempCodePoint
							}
						}
				}
			}
	
			if (codePoint === null) {
				// we did not generate a valid codePoint so insert a
				// replacement char (U+FFFD) and advance only 1 byte
				codePoint = 0xFFFD
				bytesPerSequence = 1
			} else if (codePoint > 0xFFFF) {
				// encode to utf16 (surrogate pair dance)
				codePoint -= 0x10000
				res.push(codePoint >>> 10 & 0x3FF | 0xD800)
				codePoint = 0xDC00 | codePoint & 0x3FF
			}
	
			res.push(codePoint)
			i += bytesPerSequence
		}
	
		return decodeCodePointsArray(res)
	}
	
	// Based on http://stackoverflow.com/a/22747272/680742, the browser with
	// the lowest limit is Chrome, with 0x10000 args.
	// We go 1 magnitude less, for safety
	var MAX_ARGUMENTS_LENGTH = 0x1000
	
	function decodeCodePointsArray (codePoints) {
		var len = codePoints.length
		if (len <= MAX_ARGUMENTS_LENGTH) {
			return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
		}
	
		// Decode in chunks to avoid "call stack size exceeded".
		var res = ''
		var i = 0
		while (i < len) {
			res += String.fromCharCode.apply(
				String,
				codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
			)
		}
		return res
	}
	
	function asciiSlice (buf, start, end) {
		var ret = ''
		end = Math.min(buf.length, end)
	
		for (var i = start; i < end; ++i) {
			ret += String.fromCharCode(buf[i] & 0x7F)
		}
		return ret
	}
	
	function latin1Slice (buf, start, end) {
		var ret = ''
		end = Math.min(buf.length, end)
	
		for (var i = start; i < end; ++i) {
			ret += String.fromCharCode(buf[i])
		}
		return ret
	}
	
	function hexSlice (buf, start, end) {
		var len = buf.length
	
		if (!start || start < 0) start = 0
		if (!end || end < 0 || end > len) end = len
	
		var out = ''
		for (var i = start; i < end; ++i) {
			out += toHex(buf[i])
		}
		return out
	}
	
	function utf16leSlice (buf, start, end) {
		var bytes = buf.slice(start, end)
		var res = ''
		for (var i = 0; i < bytes.length; i += 2) {
			res += String.fromCharCode(bytes[i] + (bytes[i + 1] * 256))
		}
		return res
	}
	
	Buffer.prototype.slice = function slice (start, end) {
		var len = this.length
		start = ~~start
		end = end === undefined ? len : ~~end
	
		if (start < 0) {
			start += len
			if (start < 0) start = 0
		} else if (start > len) {
			start = len
		}
	
		if (end < 0) {
			end += len
			if (end < 0) end = 0
		} else if (end > len) {
			end = len
		}
	
		if (end < start) end = start
	
		var newBuf = this.subarray(start, end)
		// Return an augmented `Uint8Array` instance
		newBuf.__proto__ = Buffer.prototype
		return newBuf
	}
	
	/*
	 * Need to make sure that buffer isn't trying to write out of bounds.
	 */
	function checkOffset (offset, ext, length) {
		if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
		if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
	}
	
	Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
		offset = offset >>> 0
		byteLength = byteLength >>> 0
		if (!noAssert) checkOffset(offset, byteLength, this.length)
	
		var val = this[offset]
		var mul = 1
		var i = 0
		while (++i < byteLength && (mul *= 0x100)) {
			val += this[offset + i] * mul
		}
	
		return val
	}
	
	Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
		offset = offset >>> 0
		byteLength = byteLength >>> 0
		if (!noAssert) {
			checkOffset(offset, byteLength, this.length)
		}
	
		var val = this[offset + --byteLength]
		var mul = 1
		while (byteLength > 0 && (mul *= 0x100)) {
			val += this[offset + --byteLength] * mul
		}
	
		return val
	}
	
	Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
		offset = offset >>> 0
		if (!noAssert) checkOffset(offset, 1, this.length)
		return this[offset]
	}
	
	Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
		offset = offset >>> 0
		if (!noAssert) checkOffset(offset, 2, this.length)
		return this[offset] | (this[offset + 1] << 8)
	}
	
	Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
		offset = offset >>> 0
		if (!noAssert) checkOffset(offset, 2, this.length)
		return (this[offset] << 8) | this[offset + 1]
	}
	
	Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
		offset = offset >>> 0
		if (!noAssert) checkOffset(offset, 4, this.length)
	
		return ((this[offset]) |
				(this[offset + 1] << 8) |
				(this[offset + 2] << 16)) +
				(this[offset + 3] * 0x1000000)
	}
	
	Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
		offset = offset >>> 0
		if (!noAssert) checkOffset(offset, 4, this.length)
	
		return (this[offset] * 0x1000000) +
			((this[offset + 1] << 16) |
			(this[offset + 2] << 8) |
			this[offset + 3])
	}
	
	Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
		offset = offset >>> 0
		byteLength = byteLength >>> 0
		if (!noAssert) checkOffset(offset, byteLength, this.length)
	
		var val = this[offset]
		var mul = 1
		var i = 0
		while (++i < byteLength && (mul *= 0x100)) {
			val += this[offset + i] * mul
		}
		mul *= 0x80
	
		if (val >= mul) val -= Math.pow(2, 8 * byteLength)
	
		return val
	}
	
	Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
		offset = offset >>> 0
		byteLength = byteLength >>> 0
		if (!noAssert) checkOffset(offset, byteLength, this.length)
	
		var i = byteLength
		var mul = 1
		var val = this[offset + --i]
		while (i > 0 && (mul *= 0x100)) {
			val += this[offset + --i] * mul
		}
		mul *= 0x80
	
		if (val >= mul) val -= Math.pow(2, 8 * byteLength)
	
		return val
	}
	
	Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
		offset = offset >>> 0
		if (!noAssert) checkOffset(offset, 1, this.length)
		if (!(this[offset] & 0x80)) return (this[offset])
		return ((0xff - this[offset] + 1) * -1)
	}
	
	Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
		offset = offset >>> 0
		if (!noAssert) checkOffset(offset, 2, this.length)
		var val = this[offset] | (this[offset + 1] << 8)
		return (val & 0x8000) ? val | 0xFFFF0000 : val
	}
	
	Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
		offset = offset >>> 0
		if (!noAssert) checkOffset(offset, 2, this.length)
		var val = this[offset + 1] | (this[offset] << 8)
		return (val & 0x8000) ? val | 0xFFFF0000 : val
	}
	
	Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
		offset = offset >>> 0
		if (!noAssert) checkOffset(offset, 4, this.length)
	
		return (this[offset]) |
			(this[offset + 1] << 8) |
			(this[offset + 2] << 16) |
			(this[offset + 3] << 24)
	}
	
	Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
		offset = offset >>> 0
		if (!noAssert) checkOffset(offset, 4, this.length)
	
		return (this[offset] << 24) |
			(this[offset + 1] << 16) |
			(this[offset + 2] << 8) |
			(this[offset + 3])
	}
	
	Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
		offset = offset >>> 0
		if (!noAssert) checkOffset(offset, 4, this.length)
		return ieee754.read(this, offset, true, 23, 4)
	}
	
	Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
		offset = offset >>> 0
		if (!noAssert) checkOffset(offset, 4, this.length)
		return ieee754.read(this, offset, false, 23, 4)
	}
	
	Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
		offset = offset >>> 0
		if (!noAssert) checkOffset(offset, 8, this.length)
		return ieee754.read(this, offset, true, 52, 8)
	}
	
	Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
		offset = offset >>> 0
		if (!noAssert) checkOffset(offset, 8, this.length)
		return ieee754.read(this, offset, false, 52, 8)
	}
	
	function checkInt (buf, value, offset, ext, max, min) {
		if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
		if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
		if (offset + ext > buf.length) throw new RangeError('Index out of range')
	}
	
	Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
		value = +value
		offset = offset >>> 0
		byteLength = byteLength >>> 0
		if (!noAssert) {
			var maxBytes = Math.pow(2, 8 * byteLength) - 1
			checkInt(this, value, offset, byteLength, maxBytes, 0)
		}
	
		var mul = 1
		var i = 0
		this[offset] = value & 0xFF
		while (++i < byteLength && (mul *= 0x100)) {
			this[offset + i] = (value / mul) & 0xFF
		}
	
		return offset + byteLength
	}
	
	Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
		value = +value
		offset = offset >>> 0
		byteLength = byteLength >>> 0
		if (!noAssert) {
			var maxBytes = Math.pow(2, 8 * byteLength) - 1
			checkInt(this, value, offset, byteLength, maxBytes, 0)
		}
	
		var i = byteLength - 1
		var mul = 1
		this[offset + i] = value & 0xFF
		while (--i >= 0 && (mul *= 0x100)) {
			this[offset + i] = (value / mul) & 0xFF
		}
	
		return offset + byteLength
	}
	
	Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
		value = +value
		offset = offset >>> 0
		if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
		this[offset] = (value & 0xff)
		return offset + 1
	}
	
	Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
		value = +value
		offset = offset >>> 0
		if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
		this[offset] = (value & 0xff)
		this[offset + 1] = (value >>> 8)
		return offset + 2
	}
	
	Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
		value = +value
		offset = offset >>> 0
		if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
		this[offset] = (value >>> 8)
		this[offset + 1] = (value & 0xff)
		return offset + 2
	}
	
	Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
		value = +value
		offset = offset >>> 0
		if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
		this[offset + 3] = (value >>> 24)
		this[offset + 2] = (value >>> 16)
		this[offset + 1] = (value >>> 8)
		this[offset] = (value & 0xff)
		return offset + 4
	}
	
	Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
		value = +value
		offset = offset >>> 0
		if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
		this[offset] = (value >>> 24)
		this[offset + 1] = (value >>> 16)
		this[offset + 2] = (value >>> 8)
		this[offset + 3] = (value & 0xff)
		return offset + 4
	}
	
	Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
		value = +value
		offset = offset >>> 0
		if (!noAssert) {
			var limit = Math.pow(2, (8 * byteLength) - 1)
	
			checkInt(this, value, offset, byteLength, limit - 1, -limit)
		}
	
		var i = 0
		var mul = 1
		var sub = 0
		this[offset] = value & 0xFF
		while (++i < byteLength && (mul *= 0x100)) {
			if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
				sub = 1
			}
			this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
		}
	
		return offset + byteLength
	}
	
	Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
		value = +value
		offset = offset >>> 0
		if (!noAssert) {
			var limit = Math.pow(2, (8 * byteLength) - 1)
	
			checkInt(this, value, offset, byteLength, limit - 1, -limit)
		}
	
		var i = byteLength - 1
		var mul = 1
		var sub = 0
		this[offset + i] = value & 0xFF
		while (--i >= 0 && (mul *= 0x100)) {
			if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
				sub = 1
			}
			this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
		}
	
		return offset + byteLength
	}
	
	Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
		value = +value
		offset = offset >>> 0
		if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
		if (value < 0) value = 0xff + value + 1
		this[offset] = (value & 0xff)
		return offset + 1
	}
	
	Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
		value = +value
		offset = offset >>> 0
		if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
		this[offset] = (value & 0xff)
		this[offset + 1] = (value >>> 8)
		return offset + 2
	}
	
	Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
		value = +value
		offset = offset >>> 0
		if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
		this[offset] = (value >>> 8)
		this[offset + 1] = (value & 0xff)
		return offset + 2
	}
	
	Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
		value = +value
		offset = offset >>> 0
		if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
		this[offset] = (value & 0xff)
		this[offset + 1] = (value >>> 8)
		this[offset + 2] = (value >>> 16)
		this[offset + 3] = (value >>> 24)
		return offset + 4
	}
	
	Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
		value = +value
		offset = offset >>> 0
		if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
		if (value < 0) value = 0xffffffff + value + 1
		this[offset] = (value >>> 24)
		this[offset + 1] = (value >>> 16)
		this[offset + 2] = (value >>> 8)
		this[offset + 3] = (value & 0xff)
		return offset + 4
	}
	
	function checkIEEE754 (buf, value, offset, ext, max, min) {
		if (offset + ext > buf.length) throw new RangeError('Index out of range')
		if (offset < 0) throw new RangeError('Index out of range')
	}
	
	function writeFloat (buf, value, offset, littleEndian, noAssert) {
		value = +value
		offset = offset >>> 0
		if (!noAssert) {
			checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
		}
		ieee754.write(buf, value, offset, littleEndian, 23, 4)
		return offset + 4
	}
	
	Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
		return writeFloat(this, value, offset, true, noAssert)
	}
	
	Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
		return writeFloat(this, value, offset, false, noAssert)
	}
	
	function writeDouble (buf, value, offset, littleEndian, noAssert) {
		value = +value
		offset = offset >>> 0
		if (!noAssert) {
			checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
		}
		ieee754.write(buf, value, offset, littleEndian, 52, 8)
		return offset + 8
	}
	
	Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
		return writeDouble(this, value, offset, true, noAssert)
	}
	
	Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
		return writeDouble(this, value, offset, false, noAssert)
	}
	
	// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
	Buffer.prototype.copy = function copy (target, targetStart, start, end) {
		if (!Buffer.isBuffer(target)) throw new TypeError('argument should be a Buffer')
		if (!start) start = 0
		if (!end && end !== 0) end = this.length
		if (targetStart >= target.length) targetStart = target.length
		if (!targetStart) targetStart = 0
		if (end > 0 && end < start) end = start
	
		// Copy 0 bytes; we're done
		if (end === start) return 0
		if (target.length === 0 || this.length === 0) return 0
	
		// Fatal error conditions
		if (targetStart < 0) {
			throw new RangeError('targetStart out of bounds')
		}
		if (start < 0 || start >= this.length) throw new RangeError('Index out of range')
		if (end < 0) throw new RangeError('sourceEnd out of bounds')
	
		// Are we oob?
		if (end > this.length) end = this.length
		if (target.length - targetStart < end - start) {
			end = target.length - targetStart + start
		}
	
		var len = end - start
	
		if (this === target && typeof Uint8Array.prototype.copyWithin === 'function') {
			// Use built-in when available, missing from IE11
			this.copyWithin(targetStart, start, end)
		} else if (this === target && start < targetStart && targetStart < end) {
			// descending copy from end
			for (var i = len - 1; i >= 0; --i) {
				target[i + targetStart] = this[i + start]
			}
		} else {
			Uint8Array.prototype.set.call(
				target,
				this.subarray(start, end),
				targetStart
			)
		}
	
		return len
	}
	
	// Usage:
	//    buffer.fill(number[, offset[, end]])
	//    buffer.fill(buffer[, offset[, end]])
	//    buffer.fill(string[, offset[, end]][, encoding])
	Buffer.prototype.fill = function fill (val, start, end, encoding) {
		// Handle string cases:
		if (typeof val === 'string') {
			if (typeof start === 'string') {
				encoding = start
				start = 0
				end = this.length
			} else if (typeof end === 'string') {
				encoding = end
				end = this.length
			}
			if (encoding !== undefined && typeof encoding !== 'string') {
				throw new TypeError('encoding must be a string')
			}
			if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
				throw new TypeError('Unknown encoding: ' + encoding)
			}
			if (val.length === 1) {
				var code = val.charCodeAt(0)
				if ((encoding === 'utf8' && code < 128) ||
						encoding === 'latin1') {
					// Fast path: If `val` fits into a single byte, use that numeric value.
					val = code
				}
			}
		} else if (typeof val === 'number') {
			val = val & 255
		}
	
		// Invalid ranges are not set to a default, so can range check early.
		if (start < 0 || this.length < start || this.length < end) {
			throw new RangeError('Out of range index')
		}
	
		if (end <= start) {
			return this
		}
	
		start = start >>> 0
		end = end === undefined ? this.length : end >>> 0
	
		if (!val) val = 0
	
		var i
		if (typeof val === 'number') {
			for (i = start; i < end; ++i) {
				this[i] = val
			}
		} else {
			var bytes = Buffer.isBuffer(val)
				? val
				: Buffer.from(val, encoding)
			var len = bytes.length
			if (len === 0) {
				throw new TypeError('The value "' + val +
					'" is invalid for argument "value"')
			}
			for (i = 0; i < end - start; ++i) {
				this[i + start] = bytes[i % len]
			}
		}
	
		return this
	}
	
	// HELPER FUNCTIONS
	// ================
	
	var INVALID_BASE64_RE = /[^+/0-9A-Za-z-_]/g
	
	function base64clean (str) {
		// Node takes equal signs as end of the Base64 encoding
		str = str.split('=')[0]
		// Node strips out invalid characters like \n and \t from the string, base64-js does not
		str = str.trim().replace(INVALID_BASE64_RE, '')
		// Node converts strings with length < 2 to ''
		if (str.length < 2) return ''
		// Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
		while (str.length % 4 !== 0) {
			str = str + '='
		}
		return str
	}
	
	function toHex (n) {
		if (n < 16) return '0' + n.toString(16)
		return n.toString(16)
	}
	
	function utf8ToBytes (string, units) {
		units = units || Infinity
		var codePoint
		var length = string.length
		var leadSurrogate = null
		var bytes = []
	
		for (var i = 0; i < length; ++i) {
			codePoint = string.charCodeAt(i)
	
			// is surrogate component
			if (codePoint > 0xD7FF && codePoint < 0xE000) {
				// last char was a lead
				if (!leadSurrogate) {
					// no lead yet
					if (codePoint > 0xDBFF) {
						// unexpected trail
						if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
						continue
					} else if (i + 1 === length) {
						// unpaired lead
						if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
						continue
					}
	
					// valid lead
					leadSurrogate = codePoint
	
					continue
				}
	
				// 2 leads in a row
				if (codePoint < 0xDC00) {
					if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
					leadSurrogate = codePoint
					continue
				}
	
				// valid surrogate pair
				codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
			} else if (leadSurrogate) {
				// valid bmp char, but last char was a lead
				if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
			}
	
			leadSurrogate = null
	
			// encode utf8
			if (codePoint < 0x80) {
				if ((units -= 1) < 0) break
				bytes.push(codePoint)
			} else if (codePoint < 0x800) {
				if ((units -= 2) < 0) break
				bytes.push(
					codePoint >> 0x6 | 0xC0,
					codePoint & 0x3F | 0x80
				)
			} else if (codePoint < 0x10000) {
				if ((units -= 3) < 0) break
				bytes.push(
					codePoint >> 0xC | 0xE0,
					codePoint >> 0x6 & 0x3F | 0x80,
					codePoint & 0x3F | 0x80
				)
			} else if (codePoint < 0x110000) {
				if ((units -= 4) < 0) break
				bytes.push(
					codePoint >> 0x12 | 0xF0,
					codePoint >> 0xC & 0x3F | 0x80,
					codePoint >> 0x6 & 0x3F | 0x80,
					codePoint & 0x3F | 0x80
				)
			} else {
				throw new Error('Invalid code point')
			}
		}
	
		return bytes
	}
	
	function asciiToBytes (str) {
		var byteArray = []
		for (var i = 0; i < str.length; ++i) {
			// Node's code seems to be doing this and not & 0x7F..
			byteArray.push(str.charCodeAt(i) & 0xFF)
		}
		return byteArray
	}
	
	function utf16leToBytes (str, units) {
		var c, hi, lo
		var byteArray = []
		for (var i = 0; i < str.length; ++i) {
			if ((units -= 2) < 0) break
	
			c = str.charCodeAt(i)
			hi = c >> 8
			lo = c % 256
			byteArray.push(lo)
			byteArray.push(hi)
		}
	
		return byteArray
	}
	
	function base64ToBytes (str) {
		return base64.toByteArray(base64clean(str))
	}
	
	function blitBuffer (src, dst, offset, length) {
		for (var i = 0; i < length; ++i) {
			if ((i + offset >= dst.length) || (i >= src.length)) break
			dst[i + offset] = src[i]
		}
		return i
	}
	
	// ArrayBuffer or Uint8Array objects from other contexts (i.e. iframes) do not pass
	// the `instanceof` check but they should be treated as of that type.
	// See: https://github.com/feross/buffer/issues/166
	function isInstance (obj, type) {
		return obj instanceof type ||
			(obj != null && obj.constructor != null && obj.constructor.name != null &&
				obj.constructor.name === type.name)
	}
	function numberIsNaN (obj) {
		// For IE11 support
		return obj !== obj // eslint-disable-line no-self-compare
	}
	
	},{"base64-js":10,"ieee754":79}],13:[function(require,module,exports){
	// Copyright Joyent, Inc. and other Node contributors.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a
	// copy of this software and associated documentation files (the
	// "Software"), to deal in the Software without restriction, including
	// without limitation the rights to use, copy, modify, merge, publish,
	// distribute, sublicense, and/or sell copies of the Software, and to permit
	// persons to whom the Software is furnished to do so, subject to the
	// following conditions:
	//
	// The above copyright notice and this permission notice shall be included
	// in all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
	// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
	// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	// USE OR OTHER DEALINGS IN THE SOFTWARE.
	
	var objectCreate = Object.create || objectCreatePolyfill
	var objectKeys = Object.keys || objectKeysPolyfill
	var bind = Function.prototype.bind || functionBindPolyfill
	
	function EventEmitter() {
		if (!this._events || !Object.prototype.hasOwnProperty.call(this, '_events')) {
			this._events = objectCreate(null);
			this._eventsCount = 0;
		}
	
		this._maxListeners = this._maxListeners || undefined;
	}
	module.exports = EventEmitter;
	
	// Backwards-compat with node 0.10.x
	EventEmitter.EventEmitter = EventEmitter;
	
	EventEmitter.prototype._events = undefined;
	EventEmitter.prototype._maxListeners = undefined;
	
	// By default EventEmitters will print a warning if more than 10 listeners are
	// added to it. This is a useful default which helps finding memory leaks.
	var defaultMaxListeners = 10;
	
	var hasDefineProperty;
	try {
		var o = {};
		if (Object.defineProperty) Object.defineProperty(o, 'x', { value: 0 });
		hasDefineProperty = o.x === 0;
	} catch (err) { hasDefineProperty = false }
	if (hasDefineProperty) {
		Object.defineProperty(EventEmitter, 'defaultMaxListeners', {
			enumerable: true,
			get: function() {
				return defaultMaxListeners;
			},
			set: function(arg) {
				// check whether the input is a positive number (whose value is zero or
				// greater and not a NaN).
				if (typeof arg !== 'number' || arg < 0 || arg !== arg)
					throw new TypeError('"defaultMaxListeners" must be a positive number');
				defaultMaxListeners = arg;
			}
		});
	} else {
		EventEmitter.defaultMaxListeners = defaultMaxListeners;
	}
	
	// Obviously not all Emitters should be limited to 10. This function allows
	// that to be increased. Set to zero for unlimited.
	EventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {
		if (typeof n !== 'number' || n < 0 || isNaN(n))
			throw new TypeError('"n" argument must be a positive number');
		this._maxListeners = n;
		return this;
	};
	
	function $getMaxListeners(that) {
		if (that._maxListeners === undefined)
			return EventEmitter.defaultMaxListeners;
		return that._maxListeners;
	}
	
	EventEmitter.prototype.getMaxListeners = function getMaxListeners() {
		return $getMaxListeners(this);
	};
	
	// These standalone emit* functions are used to optimize calling of event
	// handlers for fast cases because emit() itself often has a variable number of
	// arguments and can be deoptimized because of that. These functions always have
	// the same number of arguments and thus do not get deoptimized, so the code
	// inside them can execute faster.
	function emitNone(handler, isFn, self) {
		if (isFn)
			handler.call(self);
		else {
			var len = handler.length;
			var listeners = arrayClone(handler, len);
			for (var i = 0; i < len; ++i)
				listeners[i].call(self);
		}
	}
	function emitOne(handler, isFn, self, arg1) {
		if (isFn)
			handler.call(self, arg1);
		else {
			var len = handler.length;
			var listeners = arrayClone(handler, len);
			for (var i = 0; i < len; ++i)
				listeners[i].call(self, arg1);
		}
	}
	function emitTwo(handler, isFn, self, arg1, arg2) {
		if (isFn)
			handler.call(self, arg1, arg2);
		else {
			var len = handler.length;
			var listeners = arrayClone(handler, len);
			for (var i = 0; i < len; ++i)
				listeners[i].call(self, arg1, arg2);
		}
	}
	function emitThree(handler, isFn, self, arg1, arg2, arg3) {
		if (isFn)
			handler.call(self, arg1, arg2, arg3);
		else {
			var len = handler.length;
			var listeners = arrayClone(handler, len);
			for (var i = 0; i < len; ++i)
				listeners[i].call(self, arg1, arg2, arg3);
		}
	}
	
	function emitMany(handler, isFn, self, args) {
		if (isFn)
			handler.apply(self, args);
		else {
			var len = handler.length;
			var listeners = arrayClone(handler, len);
			for (var i = 0; i < len; ++i)
				listeners[i].apply(self, args);
		}
	}
	
	EventEmitter.prototype.emit = function emit(type) {
		var er, handler, len, args, i, events;
		var doError = (type === 'error');
	
		events = this._events;
		if (events)
			doError = (doError && events.error == null);
		else if (!doError)
			return false;
	
		// If there is no 'error' event listener then throw.
		if (doError) {
			if (arguments.length > 1)
				er = arguments[1];
			if (er instanceof Error) {
				throw er; // Unhandled 'error' event
			} else {
				// At least give some kind of context to the user
				var err = new Error('Unhandled "error" event. (' + er + ')');
				err.context = er;
				throw err;
			}
			return false;
		}
	
		handler = events[type];
	
		if (!handler)
			return false;
	
		var isFn = typeof handler === 'function';
		len = arguments.length;
		switch (len) {
				// fast cases
			case 1:
				emitNone(handler, isFn, this);
				break;
			case 2:
				emitOne(handler, isFn, this, arguments[1]);
				break;
			case 3:
				emitTwo(handler, isFn, this, arguments[1], arguments[2]);
				break;
			case 4:
				emitThree(handler, isFn, this, arguments[1], arguments[2], arguments[3]);
				break;
				// slower
			default:
				args = new Array(len - 1);
				for (i = 1; i < len; i++)
					args[i - 1] = arguments[i];
				emitMany(handler, isFn, this, args);
		}
	
		return true;
	};
	
	function _addListener(target, type, listener, prepend) {
		var m;
		var events;
		var existing;
	
		if (typeof listener !== 'function')
			throw new TypeError('"listener" argument must be a function');
	
		events = target._events;
		if (!events) {
			events = target._events = objectCreate(null);
			target._eventsCount = 0;
		} else {
			// To avoid recursion in the case that type === "newListener"! Before
			// adding it to the listeners, first emit "newListener".
			if (events.newListener) {
				target.emit('newListener', type,
						listener.listener ? listener.listener : listener);
	
				// Re-assign `events` because a newListener handler could have caused the
				// this._events to be assigned to a new object
				events = target._events;
			}
			existing = events[type];
		}
	
		if (!existing) {
			// Optimize the case of one listener. Don't need the extra array object.
			existing = events[type] = listener;
			++target._eventsCount;
		} else {
			if (typeof existing === 'function') {
				// Adding the second element, need to change to array.
				existing = events[type] =
						prepend ? [listener, existing] : [existing, listener];
			} else {
				// If we've already got an array, just append.
				if (prepend) {
					existing.unshift(listener);
				} else {
					existing.push(listener);
				}
			}
	
			// Check for listener leak
			if (!existing.warned) {
				m = $getMaxListeners(target);
				if (m && m > 0 && existing.length > m) {
					existing.warned = true;
					var w = new Error('Possible EventEmitter memory leak detected. ' +
							existing.length + ' "' + String(type) + '" listeners ' +
							'added. Use emitter.setMaxListeners() to ' +
							'increase limit.');
					w.name = 'MaxListenersExceededWarning';
					w.emitter = target;
					w.type = type;
					w.count = existing.length;
					if (typeof console === 'object' && console.warn) {
						console.warn('%s: %s', w.name, w.message);
					}
				}
			}
		}
	
		return target;
	}
	
	EventEmitter.prototype.addListener = function addListener(type, listener) {
		return _addListener(this, type, listener, false);
	};
	
	EventEmitter.prototype.on = EventEmitter.prototype.addListener;
	
	EventEmitter.prototype.prependListener =
			function prependListener(type, listener) {
				return _addListener(this, type, listener, true);
			};
	
	function onceWrapper() {
		if (!this.fired) {
			this.target.removeListener(this.type, this.wrapFn);
			this.fired = true;
			switch (arguments.length) {
				case 0:
					return this.listener.call(this.target);
				case 1:
					return this.listener.call(this.target, arguments[0]);
				case 2:
					return this.listener.call(this.target, arguments[0], arguments[1]);
				case 3:
					return this.listener.call(this.target, arguments[0], arguments[1],
							arguments[2]);
				default:
					var args = new Array(arguments.length);
					for (var i = 0; i < args.length; ++i)
						args[i] = arguments[i];
					this.listener.apply(this.target, args);
			}
		}
	}
	
	function _onceWrap(target, type, listener) {
		var state = { fired: false, wrapFn: undefined, target: target, type: type, listener: listener };
		var wrapped = bind.call(onceWrapper, state);
		wrapped.listener = listener;
		state.wrapFn = wrapped;
		return wrapped;
	}
	
	EventEmitter.prototype.once = function once(type, listener) {
		if (typeof listener !== 'function')
			throw new TypeError('"listener" argument must be a function');
		this.on(type, _onceWrap(this, type, listener));
		return this;
	};
	
	EventEmitter.prototype.prependOnceListener =
			function prependOnceListener(type, listener) {
				if (typeof listener !== 'function')
					throw new TypeError('"listener" argument must be a function');
				this.prependListener(type, _onceWrap(this, type, listener));
				return this;
			};
	
	// Emits a 'removeListener' event if and only if the listener was removed.
	EventEmitter.prototype.removeListener =
			function removeListener(type, listener) {
				var list, events, position, i, originalListener;
	
				if (typeof listener !== 'function')
					throw new TypeError('"listener" argument must be a function');
	
				events = this._events;
				if (!events)
					return this;
	
				list = events[type];
				if (!list)
					return this;
	
				if (list === listener || list.listener === listener) {
					if (--this._eventsCount === 0)
						this._events = objectCreate(null);
					else {
						delete events[type];
						if (events.removeListener)
							this.emit('removeListener', type, list.listener || listener);
					}
				} else if (typeof list !== 'function') {
					position = -1;
	
					for (i = list.length - 1; i >= 0; i--) {
						if (list[i] === listener || list[i].listener === listener) {
							originalListener = list[i].listener;
							position = i;
							break;
						}
					}
	
					if (position < 0)
						return this;
	
					if (position === 0)
						list.shift();
					else
						spliceOne(list, position);
	
					if (list.length === 1)
						events[type] = list[0];
	
					if (events.removeListener)
						this.emit('removeListener', type, originalListener || listener);
				}
	
				return this;
			};
	
	EventEmitter.prototype.removeAllListeners =
			function removeAllListeners(type) {
				var listeners, events, i;
	
				events = this._events;
				if (!events)
					return this;
	
				// not listening for removeListener, no need to emit
				if (!events.removeListener) {
					if (arguments.length === 0) {
						this._events = objectCreate(null);
						this._eventsCount = 0;
					} else if (events[type]) {
						if (--this._eventsCount === 0)
							this._events = objectCreate(null);
						else
							delete events[type];
					}
					return this;
				}
	
				// emit removeListener for all listeners on all events
				if (arguments.length === 0) {
					var keys = objectKeys(events);
					var key;
					for (i = 0; i < keys.length; ++i) {
						key = keys[i];
						if (key === 'removeListener') continue;
						this.removeAllListeners(key);
					}
					this.removeAllListeners('removeListener');
					this._events = objectCreate(null);
					this._eventsCount = 0;
					return this;
				}
	
				listeners = events[type];
	
				if (typeof listeners === 'function') {
					this.removeListener(type, listeners);
				} else if (listeners) {
					// LIFO order
					for (i = listeners.length - 1; i >= 0; i--) {
						this.removeListener(type, listeners[i]);
					}
				}
	
				return this;
			};
	
	function _listeners(target, type, unwrap) {
		var events = target._events;
	
		if (!events)
			return [];
	
		var evlistener = events[type];
		if (!evlistener)
			return [];
	
		if (typeof evlistener === 'function')
			return unwrap ? [evlistener.listener || evlistener] : [evlistener];
	
		return unwrap ? unwrapListeners(evlistener) : arrayClone(evlistener, evlistener.length);
	}
	
	EventEmitter.prototype.listeners = function listeners(type) {
		return _listeners(this, type, true);
	};
	
	EventEmitter.prototype.rawListeners = function rawListeners(type) {
		return _listeners(this, type, false);
	};
	
	EventEmitter.listenerCount = function(emitter, type) {
		if (typeof emitter.listenerCount === 'function') {
			return emitter.listenerCount(type);
		} else {
			return listenerCount.call(emitter, type);
		}
	};
	
	EventEmitter.prototype.listenerCount = listenerCount;
	function listenerCount(type) {
		var events = this._events;
	
		if (events) {
			var evlistener = events[type];
	
			if (typeof evlistener === 'function') {
				return 1;
			} else if (evlistener) {
				return evlistener.length;
			}
		}
	
		return 0;
	}
	
	EventEmitter.prototype.eventNames = function eventNames() {
		return this._eventsCount > 0 ? Reflect.ownKeys(this._events) : [];
	};
	
	// About 1.5x faster than the two-arg version of Array#splice().
	function spliceOne(list, index) {
		for (var i = index, k = i + 1, n = list.length; k < n; i += 1, k += 1)
			list[i] = list[k];
		list.pop();
	}
	
	function arrayClone(arr, n) {
		var copy = new Array(n);
		for (var i = 0; i < n; ++i)
			copy[i] = arr[i];
		return copy;
	}
	
	function unwrapListeners(arr) {
		var ret = new Array(arr.length);
		for (var i = 0; i < ret.length; ++i) {
			ret[i] = arr[i].listener || arr[i];
		}
		return ret;
	}
	
	function objectCreatePolyfill(proto) {
		var F = function() {};
		F.prototype = proto;
		return new F;
	}
	function objectKeysPolyfill(obj) {
		var keys = [];
		for (var k in obj) if (Object.prototype.hasOwnProperty.call(obj, k)) {
			keys.push(k);
		}
		return k;
	}
	function functionBindPolyfill(context) {
		var fn = this;
		return function () {
			return fn.apply(context, arguments);
		};
	}
	
	},{}],14:[function(require,module,exports){
	(function (Buffer){
	// Copyright Joyent, Inc. and other Node contributors.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a
	// copy of this software and associated documentation files (the
	// "Software"), to deal in the Software without restriction, including
	// without limitation the rights to use, copy, modify, merge, publish,
	// distribute, sublicense, and/or sell copies of the Software, and to permit
	// persons to whom the Software is furnished to do so, subject to the
	// following conditions:
	//
	// The above copyright notice and this permission notice shall be included
	// in all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
	// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
	// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	// USE OR OTHER DEALINGS IN THE SOFTWARE.
	
	// NOTE: These type checking functions intentionally don't use `instanceof`
	// because it is fragile and can be easily faked with `Object.create()`.
	
	function isArray(arg) {
		if (Array.isArray) {
			return Array.isArray(arg);
		}
		return objectToString(arg) === '[object Array]';
	}
	exports.isArray = isArray;
	
	function isBoolean(arg) {
		return typeof arg === 'boolean';
	}
	exports.isBoolean = isBoolean;
	
	function isNull(arg) {
		return arg === null;
	}
	exports.isNull = isNull;
	
	function isNullOrUndefined(arg) {
		return arg == null;
	}
	exports.isNullOrUndefined = isNullOrUndefined;
	
	function isNumber(arg) {
		return typeof arg === 'number';
	}
	exports.isNumber = isNumber;
	
	function isString(arg) {
		return typeof arg === 'string';
	}
	exports.isString = isString;
	
	function isSymbol(arg) {
		return typeof arg === 'symbol';
	}
	exports.isSymbol = isSymbol;
	
	function isUndefined(arg) {
		return arg === void 0;
	}
	exports.isUndefined = isUndefined;
	
	function isRegExp(re) {
		return objectToString(re) === '[object RegExp]';
	}
	exports.isRegExp = isRegExp;
	
	function isObject(arg) {
		return typeof arg === 'object' && arg !== null;
	}
	exports.isObject = isObject;
	
	function isDate(d) {
		return objectToString(d) === '[object Date]';
	}
	exports.isDate = isDate;
	
	function isError(e) {
		return (objectToString(e) === '[object Error]' || e instanceof Error);
	}
	exports.isError = isError;
	
	function isFunction(arg) {
		return typeof arg === 'function';
	}
	exports.isFunction = isFunction;
	
	function isPrimitive(arg) {
		return arg === null ||
					 typeof arg === 'boolean' ||
					 typeof arg === 'number' ||
					 typeof arg === 'string' ||
					 typeof arg === 'symbol' ||  // ES6 symbol
					 typeof arg === 'undefined';
	}
	exports.isPrimitive = isPrimitive;
	
	exports.isBuffer = Buffer.isBuffer;
	
	function objectToString(o) {
		return Object.prototype.toString.call(o);
	}
	
	}).call(this,{"isBuffer":require("../../is-buffer/index.js")})
	},{"../../is-buffer/index.js":81}],15:[function(require,module,exports){
	'use strict';
	
	var copy             = require('es5-ext/object/copy')
		, normalizeOptions = require('es5-ext/object/normalize-options')
		, ensureCallable   = require('es5-ext/object/valid-callable')
		, map              = require('es5-ext/object/map')
		, callable         = require('es5-ext/object/valid-callable')
		, validValue       = require('es5-ext/object/valid-value')
	
		, bind = Function.prototype.bind, defineProperty = Object.defineProperty
		, hasOwnProperty = Object.prototype.hasOwnProperty
		, define;
	
	define = function (name, desc, options) {
		var value = validValue(desc) && callable(desc.value), dgs;
		dgs = copy(desc);
		delete dgs.writable;
		delete dgs.value;
		dgs.get = function () {
			if (!options.overwriteDefinition && hasOwnProperty.call(this, name)) return value;
			desc.value = bind.call(value, options.resolveContext ? options.resolveContext(this) : this);
			defineProperty(this, name, desc);
			return this[name];
		};
		return dgs;
	};
	
	module.exports = function (props/*, options*/) {
		var options = normalizeOptions(arguments[1]);
		if (options.resolveContext != null) ensureCallable(options.resolveContext);
		return map(props, function (desc, name) { return define(name, desc, options); });
	};
	
	},{"es5-ext/object/copy":39,"es5-ext/object/map":48,"es5-ext/object/normalize-options":49,"es5-ext/object/valid-callable":54,"es5-ext/object/valid-value":55}],16:[function(require,module,exports){
	'use strict';
	
	var assign        = require('es5-ext/object/assign')
		, normalizeOpts = require('es5-ext/object/normalize-options')
		, isCallable    = require('es5-ext/object/is-callable')
		, contains      = require('es5-ext/string/#/contains')
	
		, d;
	
	d = module.exports = function (dscr, value/*, options*/) {
		var c, e, w, options, desc;
		if ((arguments.length < 2) || (typeof dscr !== 'string')) {
			options = value;
			value = dscr;
			dscr = null;
		} else {
			options = arguments[2];
		}
		if (dscr == null) {
			c = w = true;
			e = false;
		} else {
			c = contains.call(dscr, 'c');
			e = contains.call(dscr, 'e');
			w = contains.call(dscr, 'w');
		}
	
		desc = { value: value, configurable: c, enumerable: e, writable: w };
		return !options ? desc : assign(normalizeOpts(options), desc);
	};
	
	d.gs = function (dscr, get, set/*, options*/) {
		var c, e, options, desc;
		if (typeof dscr !== 'string') {
			options = set;
			set = get;
			get = dscr;
			dscr = null;
		} else {
			options = arguments[3];
		}
		if (get == null) {
			get = undefined;
		} else if (!isCallable(get)) {
			options = get;
			get = set = undefined;
		} else if (set == null) {
			set = undefined;
		} else if (!isCallable(set)) {
			options = set;
			set = undefined;
		}
		if (dscr == null) {
			c = true;
			e = false;
		} else {
			c = contains.call(dscr, 'c');
			e = contains.call(dscr, 'e');
		}
	
		desc = { get: get, set: set, configurable: c, enumerable: e };
		return !options ? desc : assign(normalizeOpts(options), desc);
	};
	
	},{"es5-ext/object/assign":36,"es5-ext/object/is-callable":42,"es5-ext/object/normalize-options":49,"es5-ext/string/#/contains":56}],17:[function(require,module,exports){
	(function (process,Buffer){
	var stream = require('readable-stream')
	var eos = require('end-of-stream')
	var inherits = require('inherits')
	var shift = require('stream-shift')
	
	var SIGNAL_FLUSH = (Buffer.from && Buffer.from !== Uint8Array.from)
		? Buffer.from([0])
		: new Buffer([0])
	
	var onuncork = function(self, fn) {
		if (self._corked) self.once('uncork', fn)
		else fn()
	}
	
	var autoDestroy = function (self, err) {
		if (self._autoDestroy) self.destroy(err)
	}
	
	var destroyer = function(self, end) {
		return function(err) {
			if (err) autoDestroy(self, err.message === 'premature close' ? null : err)
			else if (end && !self._ended) self.end()
		}
	}
	
	var end = function(ws, fn) {
		if (!ws) return fn()
		if (ws._writableState && ws._writableState.finished) return fn()
		if (ws._writableState) return ws.end(fn)
		ws.end()
		fn()
	}
	
	var toStreams2 = function(rs) {
		return new (stream.Readable)({objectMode:true, highWaterMark:16}).wrap(rs)
	}
	
	var Duplexify = function(writable, readable, opts) {
		if (!(this instanceof Duplexify)) return new Duplexify(writable, readable, opts)
		stream.Duplex.call(this, opts)
	
		this._writable = null
		this._readable = null
		this._readable2 = null
	
		this._autoDestroy = !opts || opts.autoDestroy !== false
		this._forwardDestroy = !opts || opts.destroy !== false
		this._forwardEnd = !opts || opts.end !== false
		this._corked = 1 // start corked
		this._ondrain = null
		this._drained = false
		this._forwarding = false
		this._unwrite = null
		this._unread = null
		this._ended = false
	
		this.destroyed = false
	
		if (writable) this.setWritable(writable)
		if (readable) this.setReadable(readable)
	}
	
	inherits(Duplexify, stream.Duplex)
	
	Duplexify.obj = function(writable, readable, opts) {
		if (!opts) opts = {}
		opts.objectMode = true
		opts.highWaterMark = 16
		return new Duplexify(writable, readable, opts)
	}
	
	Duplexify.prototype.cork = function() {
		if (++this._corked === 1) this.emit('cork')
	}
	
	Duplexify.prototype.uncork = function() {
		if (this._corked && --this._corked === 0) this.emit('uncork')
	}
	
	Duplexify.prototype.setWritable = function(writable) {
		if (this._unwrite) this._unwrite()
	
		if (this.destroyed) {
			if (writable && writable.destroy) writable.destroy()
			return
		}
	
		if (writable === null || writable === false) {
			this.end()
			return
		}
	
		var self = this
		var unend = eos(writable, {writable:true, readable:false}, destroyer(this, this._forwardEnd))
	
		var ondrain = function() {
			var ondrain = self._ondrain
			self._ondrain = null
			if (ondrain) ondrain()
		}
	
		var clear = function() {
			self._writable.removeListener('drain', ondrain)
			unend()
		}
	
		if (this._unwrite) process.nextTick(ondrain) // force a drain on stream reset to avoid livelocks
	
		this._writable = writable
		this._writable.on('drain', ondrain)
		this._unwrite = clear
	
		this.uncork() // always uncork setWritable
	}
	
	Duplexify.prototype.setReadable = function(readable) {
		if (this._unread) this._unread()
	
		if (this.destroyed) {
			if (readable && readable.destroy) readable.destroy()
			return
		}
	
		if (readable === null || readable === false) {
			this.push(null)
			this.resume()
			return
		}
	
		var self = this
		var unend = eos(readable, {writable:false, readable:true}, destroyer(this))
	
		var onreadable = function() {
			self._forward()
		}
	
		var onend = function() {
			self.push(null)
		}
	
		var clear = function() {
			self._readable2.removeListener('readable', onreadable)
			self._readable2.removeListener('end', onend)
			unend()
		}
	
		this._drained = true
		this._readable = readable
		this._readable2 = readable._readableState ? readable : toStreams2(readable)
		this._readable2.on('readable', onreadable)
		this._readable2.on('end', onend)
		this._unread = clear
	
		this._forward()
	}
	
	Duplexify.prototype._read = function() {
		this._drained = true
		this._forward()
	}
	
	Duplexify.prototype._forward = function() {
		if (this._forwarding || !this._readable2 || !this._drained) return
		this._forwarding = true
	
		var data
	
		while (this._drained && (data = shift(this._readable2)) !== null) {
			if (this.destroyed) continue
			this._drained = this.push(data)
		}
	
		this._forwarding = false
	}
	
	Duplexify.prototype.destroy = function(err) {
		if (this.destroyed) return
		this.destroyed = true
	
		var self = this
		process.nextTick(function() {
			self._destroy(err)
		})
	}
	
	Duplexify.prototype._destroy = function(err) {
		if (err) {
			var ondrain = this._ondrain
			this._ondrain = null
			if (ondrain) ondrain(err)
			else this.emit('error', err)
		}
	
		if (this._forwardDestroy) {
			if (this._readable && this._readable.destroy) this._readable.destroy()
			if (this._writable && this._writable.destroy) this._writable.destroy()
		}
	
		this.emit('close')
	}
	
	Duplexify.prototype._write = function(data, enc, cb) {
		if (this.destroyed) return cb()
		if (this._corked) return onuncork(this, this._write.bind(this, data, enc, cb))
		if (data === SIGNAL_FLUSH) return this._finish(cb)
		if (!this._writable) return cb()
	
		if (this._writable.write(data) === false) this._ondrain = cb
		else cb()
	}
	
	Duplexify.prototype._finish = function(cb) {
		var self = this
		this.emit('preend')
		onuncork(this, function() {
			end(self._forwardEnd && self._writable, function() {
				// haxx to not emit prefinish twice
				if (self._writableState.prefinished === false) self._writableState.prefinished = true
				self.emit('prefinish')
				onuncork(self, cb)
			})
		})
	}
	
	Duplexify.prototype.end = function(data, enc, cb) {
		if (typeof data === 'function') return this.end(null, null, data)
		if (typeof enc === 'function') return this.end(data, null, enc)
		this._ended = true
		if (data) this.write(data)
		if (!this._writableState.ending) this.write(SIGNAL_FLUSH)
		return stream.Writable.prototype.end.call(this, cb)
	}
	
	module.exports = Duplexify
	
	}).call(this,require('_process'),require("buffer").Buffer)
	},{"_process":92,"buffer":12,"end-of-stream":18,"inherits":80,"readable-stream":108,"stream-shift":111}],18:[function(require,module,exports){
	var once = require('once');
	
	var noop = function() {};
	
	var isRequest = function(stream) {
		return stream.setHeader && typeof stream.abort === 'function';
	};
	
	var isChildProcess = function(stream) {
		return stream.stdio && Array.isArray(stream.stdio) && stream.stdio.length === 3
	};
	
	var eos = function(stream, opts, callback) {
		if (typeof opts === 'function') return eos(stream, null, opts);
		if (!opts) opts = {};
	
		callback = once(callback || noop);
	
		var ws = stream._writableState;
		var rs = stream._readableState;
		var readable = opts.readable || (opts.readable !== false && stream.readable);
		var writable = opts.writable || (opts.writable !== false && stream.writable);
	
		var onlegacyfinish = function() {
			if (!stream.writable) onfinish();
		};
	
		var onfinish = function() {
			writable = false;
			if (!readable) callback.call(stream);
		};
	
		var onend = function() {
			readable = false;
			if (!writable) callback.call(stream);
		};
	
		var onexit = function(exitCode) {
			callback.call(stream, exitCode ? new Error('exited with error code: ' + exitCode) : null);
		};
	
		var onerror = function(err) {
			callback.call(stream, err);
		};
	
		var onclose = function() {
			if (readable && !(rs && rs.ended)) return callback.call(stream, new Error('premature close'));
			if (writable && !(ws && ws.ended)) return callback.call(stream, new Error('premature close'));
		};
	
		var onrequest = function() {
			stream.req.on('finish', onfinish);
		};
	
		if (isRequest(stream)) {
			stream.on('complete', onfinish);
			stream.on('abort', onclose);
			if (stream.req) onrequest();
			else stream.on('request', onrequest);
		} else if (writable && !ws) { // legacy streams
			stream.on('end', onlegacyfinish);
			stream.on('close', onlegacyfinish);
		}
	
		if (isChildProcess(stream)) stream.on('exit', onexit);
	
		stream.on('end', onend);
		stream.on('finish', onfinish);
		if (opts.error !== false) stream.on('error', onerror);
		stream.on('close', onclose);
	
		return function() {
			stream.removeListener('complete', onfinish);
			stream.removeListener('abort', onclose);
			stream.removeListener('request', onrequest);
			if (stream.req) stream.req.removeListener('finish', onfinish);
			stream.removeListener('end', onlegacyfinish);
			stream.removeListener('close', onlegacyfinish);
			stream.removeListener('finish', onfinish);
			stream.removeListener('exit', onexit);
			stream.removeListener('end', onend);
			stream.removeListener('error', onerror);
			stream.removeListener('close', onclose);
		};
	};
	
	module.exports = eos;
	
	},{"once":90}],19:[function(require,module,exports){
	// Inspired by Google Closure:
	// http://closure-library.googlecode.com/svn/docs/
	// closure_goog_array_array.js.html#goog.array.clear
	
	"use strict";
	
	var value = require("../../object/valid-value");
	
	module.exports = function () {
		value(this).length = 0;
		return this;
	};
	
	},{"../../object/valid-value":55}],20:[function(require,module,exports){
	"use strict";
	
	var numberIsNaN       = require("../../number/is-nan")
		, toPosInt          = require("../../number/to-pos-integer")
		, value             = require("../../object/valid-value")
		, indexOf           = Array.prototype.indexOf
		, objHasOwnProperty = Object.prototype.hasOwnProperty
		, abs               = Math.abs
		, floor             = Math.floor;
	
	module.exports = function (searchElement /*, fromIndex*/) {
		var i, length, fromIndex, val;
		if (!numberIsNaN(searchElement)) return indexOf.apply(this, arguments);
	
		length = toPosInt(value(this).length);
		fromIndex = arguments[1];
		if (isNaN(fromIndex)) fromIndex = 0;
		else if (fromIndex >= 0) fromIndex = floor(fromIndex);
		else fromIndex = toPosInt(this.length) - floor(abs(fromIndex));
	
		for (i = fromIndex; i < length; ++i) {
			if (objHasOwnProperty.call(this, i)) {
				val = this[i];
				if (numberIsNaN(val)) return i; // Jslint: ignore
			}
		}
		return -1;
	};
	
	},{"../../number/is-nan":30,"../../number/to-pos-integer":34,"../../object/valid-value":55}],21:[function(require,module,exports){
	"use strict";
	
	module.exports = require("./is-implemented")()
		? Array.from
		: require("./shim");
	
	},{"./is-implemented":22,"./shim":23}],22:[function(require,module,exports){
	"use strict";
	
	module.exports = function () {
		var from = Array.from, arr, result;
		if (typeof from !== "function") return false;
		arr = ["raz", "dwa"];
		result = from(arr);
		return Boolean(result && (result !== arr) && (result[1] === "dwa"));
	};
	
	},{}],23:[function(require,module,exports){
	"use strict";
	
	var iteratorSymbol = require("es6-symbol").iterator
		, isArguments    = require("../../function/is-arguments")
		, isFunction     = require("../../function/is-function")
		, toPosInt       = require("../../number/to-pos-integer")
		, callable       = require("../../object/valid-callable")
		, validValue     = require("../../object/valid-value")
		, isValue        = require("../../object/is-value")
		, isString       = require("../../string/is-string")
		, isArray        = Array.isArray
		, call           = Function.prototype.call
		, desc           = { configurable: true, enumerable: true, writable: true, value: null }
		, defineProperty = Object.defineProperty;
	
	// eslint-disable-next-line complexity, max-lines-per-function
	module.exports = function (arrayLike /*, mapFn, thisArg*/) {
		var mapFn = arguments[1]
			, thisArg = arguments[2]
			, Context
			, i
			, j
			, arr
			, length
			, code
			, iterator
			, result
			, getIterator
			, value;
	
		arrayLike = Object(validValue(arrayLike));
	
		if (isValue(mapFn)) callable(mapFn);
		if (!this || this === Array || !isFunction(this)) {
			// Result: Plain array
			if (!mapFn) {
				if (isArguments(arrayLike)) {
					// Source: Arguments
					length = arrayLike.length;
					if (length !== 1) return Array.apply(null, arrayLike);
					arr = new Array(1);
					arr[0] = arrayLike[0];
					return arr;
				}
				if (isArray(arrayLike)) {
					// Source: Array
					arr = new Array(length = arrayLike.length);
					for (i = 0; i < length; ++i) arr[i] = arrayLike[i];
					return arr;
				}
			}
			arr = [];
		} else {
			// Result: Non plain array
			Context = this;
		}
	
		if (!isArray(arrayLike)) {
			if ((getIterator = arrayLike[iteratorSymbol]) !== undefined) {
				// Source: Iterator
				iterator = callable(getIterator).call(arrayLike);
				if (Context) arr = new Context();
				result = iterator.next();
				i = 0;
				while (!result.done) {
					value = mapFn ? call.call(mapFn, thisArg, result.value, i) : result.value;
					if (Context) {
						desc.value = value;
						defineProperty(arr, i, desc);
					} else {
						arr[i] = value;
					}
					result = iterator.next();
					++i;
				}
				length = i;
			} else if (isString(arrayLike)) {
				// Source: String
				length = arrayLike.length;
				if (Context) arr = new Context();
				for (i = 0, j = 0; i < length; ++i) {
					value = arrayLike[i];
					if (i + 1 < length) {
						code = value.charCodeAt(0);
						// eslint-disable-next-line max-depth
						if (code >= 0xd800 && code <= 0xdbff) value += arrayLike[++i];
					}
					value = mapFn ? call.call(mapFn, thisArg, value, j) : value;
					if (Context) {
						desc.value = value;
						defineProperty(arr, j, desc);
					} else {
						arr[j] = value;
					}
					++j;
				}
				length = j;
			}
		}
		if (length === undefined) {
			// Source: array or array-like
			length = toPosInt(arrayLike.length);
			if (Context) arr = new Context(length);
			for (i = 0; i < length; ++i) {
				value = mapFn ? call.call(mapFn, thisArg, arrayLike[i], i) : arrayLike[i];
				if (Context) {
					desc.value = value;
					defineProperty(arr, i, desc);
				} else {
					arr[i] = value;
				}
			}
		}
		if (Context) {
			desc.value = null;
			arr.length = length;
		}
		return arr;
	};
	
	},{"../../function/is-arguments":24,"../../function/is-function":25,"../../number/to-pos-integer":34,"../../object/is-value":44,"../../object/valid-callable":54,"../../object/valid-value":55,"../../string/is-string":59,"es6-symbol":73}],24:[function(require,module,exports){
	"use strict";
	
	var objToString = Object.prototype.toString
		, id = objToString.call(
		(function () {
			return arguments;
		})()
	);
	
	module.exports = function (value) {
		return objToString.call(value) === id;
	};
	
	},{}],25:[function(require,module,exports){
	"use strict";
	
	var objToString = Object.prototype.toString, id = objToString.call(require("./noop"));
	
	module.exports = function (value) {
		return typeof value === "function" && objToString.call(value) === id;
	};
	
	},{"./noop":26}],26:[function(require,module,exports){
	"use strict";
	
	// eslint-disable-next-line no-empty-function
	module.exports = function () {};
	
	},{}],27:[function(require,module,exports){
	"use strict";
	
	module.exports = require("./is-implemented")()
		? Math.sign
		: require("./shim");
	
	},{"./is-implemented":28,"./shim":29}],28:[function(require,module,exports){
	"use strict";
	
	module.exports = function () {
		var sign = Math.sign;
		if (typeof sign !== "function") return false;
		return (sign(10) === 1) && (sign(-20) === -1);
	};
	
	},{}],29:[function(require,module,exports){
	"use strict";
	
	module.exports = function (value) {
		value = Number(value);
		if (isNaN(value) || (value === 0)) return value;
		return value > 0 ? 1 : -1;
	};
	
	},{}],30:[function(require,module,exports){
	"use strict";
	
	module.exports = require("./is-implemented")()
		? Number.isNaN
		: require("./shim");
	
	},{"./is-implemented":31,"./shim":32}],31:[function(require,module,exports){
	"use strict";
	
	module.exports = function () {
		var numberIsNaN = Number.isNaN;
		if (typeof numberIsNaN !== "function") return false;
		return !numberIsNaN({}) && numberIsNaN(NaN) && !numberIsNaN(34);
	};
	
	},{}],32:[function(require,module,exports){
	"use strict";
	
	module.exports = function (value) {
		// eslint-disable-next-line no-self-compare
		return value !== value;
	};
	
	},{}],33:[function(require,module,exports){
	"use strict";
	
	var sign = require("../math/sign")
	
		, abs = Math.abs, floor = Math.floor;
	
	module.exports = function (value) {
		if (isNaN(value)) return 0;
		value = Number(value);
		if ((value === 0) || !isFinite(value)) return value;
		return sign(value) * floor(abs(value));
	};
	
	},{"../math/sign":27}],34:[function(require,module,exports){
	"use strict";
	
	var toInteger = require("./to-integer")
	
		, max = Math.max;
	
	module.exports = function (value) {
	 return max(0, toInteger(value));
	};
	
	},{"./to-integer":33}],35:[function(require,module,exports){
	// Internal method, used by iteration functions.
	// Calls a function for each key-value pair found in object
	// Optionally takes compareFn to iterate object in specific order
	
	"use strict";
	
	var callable                = require("./valid-callable")
		, value                   = require("./valid-value")
		, bind                    = Function.prototype.bind
		, call                    = Function.prototype.call
		, keys                    = Object.keys
		, objPropertyIsEnumerable = Object.prototype.propertyIsEnumerable;
	
	module.exports = function (method, defVal) {
		return function (obj, cb /*, thisArg, compareFn*/) {
			var list, thisArg = arguments[2], compareFn = arguments[3];
			obj = Object(value(obj));
			callable(cb);
	
			list = keys(obj);
			if (compareFn) {
				list.sort(typeof compareFn === "function" ? bind.call(compareFn, obj) : undefined);
			}
			if (typeof method !== "function") method = list[method];
			return call.call(method, list, function (key, index) {
				if (!objPropertyIsEnumerable.call(obj, key)) return defVal;
				return call.call(cb, thisArg, obj[key], key, obj, index);
			});
		};
	};
	
	},{"./valid-callable":54,"./valid-value":55}],36:[function(require,module,exports){
	"use strict";
	
	module.exports = require("./is-implemented")()
		? Object.assign
		: require("./shim");
	
	},{"./is-implemented":37,"./shim":38}],37:[function(require,module,exports){
	"use strict";
	
	module.exports = function () {
		var assign = Object.assign, obj;
		if (typeof assign !== "function") return false;
		obj = { foo: "raz" };
		assign(obj, { bar: "dwa" }, { trzy: "trzy" });
		return (obj.foo + obj.bar + obj.trzy) === "razdwatrzy";
	};
	
	},{}],38:[function(require,module,exports){
	"use strict";
	
	var keys  = require("../keys")
		, value = require("../valid-value")
		, max   = Math.max;
	
	module.exports = function (dest, src /*, …srcn*/) {
		var error, i, length = max(arguments.length, 2), assign;
		dest = Object(value(dest));
		assign = function (key) {
			try {
				dest[key] = src[key];
			} catch (e) {
				if (!error) error = e;
			}
		};
		for (i = 1; i < length; ++i) {
			src = arguments[i];
			keys(src).forEach(assign);
		}
		if (error !== undefined) throw error;
		return dest;
	};
	
	},{"../keys":45,"../valid-value":55}],39:[function(require,module,exports){
	"use strict";
	
	var aFrom  = require("../array/from")
		, assign = require("./assign")
		, value  = require("./valid-value");
	
	module.exports = function (obj/*, propertyNames, options*/) {
		var copy = Object(value(obj)), propertyNames = arguments[1], options = Object(arguments[2]);
		if (copy !== obj && !propertyNames) return copy;
		var result = {};
		if (propertyNames) {
			aFrom(propertyNames, function (propertyName) {
				if (options.ensure || propertyName in obj) result[propertyName] = obj[propertyName];
			});
		} else {
			assign(result, obj);
		}
		return result;
	};
	
	},{"../array/from":21,"./assign":36,"./valid-value":55}],40:[function(require,module,exports){
	// Workaround for http://code.google.com/p/v8/issues/detail?id=2804
	
	"use strict";
	
	var create = Object.create, shim;
	
	if (!require("./set-prototype-of/is-implemented")()) {
		shim = require("./set-prototype-of/shim");
	}
	
	module.exports = (function () {
		var nullObject, polyProps, desc;
		if (!shim) return create;
		if (shim.level !== 1) return create;
	
		nullObject = {};
		polyProps = {};
		desc = {
			configurable: false,
			enumerable: false,
			writable: true,
			value: undefined
		};
		Object.getOwnPropertyNames(Object.prototype).forEach(function (name) {
			if (name === "__proto__") {
				polyProps[name] = {
					configurable: true,
					enumerable: false,
					writable: true,
					value: undefined
				};
				return;
			}
			polyProps[name] = desc;
		});
		Object.defineProperties(nullObject, polyProps);
	
		Object.defineProperty(shim, "nullPolyfill", {
			configurable: false,
			enumerable: false,
			writable: false,
			value: nullObject
		});
	
		return function (prototype, props) {
			return create(prototype === null ? nullObject : prototype, props);
		};
	}());
	
	},{"./set-prototype-of/is-implemented":52,"./set-prototype-of/shim":53}],41:[function(require,module,exports){
	"use strict";
	
	module.exports = require("./_iterate")("forEach");
	
	},{"./_iterate":35}],42:[function(require,module,exports){
	// Deprecated
	
	"use strict";
	
	module.exports = function (obj) {
	 return typeof obj === "function";
	};
	
	},{}],43:[function(require,module,exports){
	"use strict";
	
	var isValue = require("./is-value");
	
	var map = { function: true, object: true };
	
	module.exports = function (value) {
		return (isValue(value) && map[typeof value]) || false;
	};
	
	},{"./is-value":44}],44:[function(require,module,exports){
	"use strict";
	
	var _undefined = require("../function/noop")(); // Support ES3 engines
	
	module.exports = function (val) {
	 return (val !== _undefined) && (val !== null);
	};
	
	},{"../function/noop":26}],45:[function(require,module,exports){
	"use strict";
	
	module.exports = require("./is-implemented")() ? Object.keys : require("./shim");
	
	},{"./is-implemented":46,"./shim":47}],46:[function(require,module,exports){
	"use strict";
	
	module.exports = function () {
		try {
			Object.keys("primitive");
			return true;
		} catch (e) {
			return false;
		}
	};
	
	},{}],47:[function(require,module,exports){
	"use strict";
	
	var isValue = require("../is-value");
	
	var keys = Object.keys;
	
	module.exports = function (object) { return keys(isValue(object) ? Object(object) : object); };
	
	},{"../is-value":44}],48:[function(require,module,exports){
	"use strict";
	
	var callable = require("./valid-callable")
		, forEach  = require("./for-each")
		, call     = Function.prototype.call;
	
	module.exports = function (obj, cb /*, thisArg*/) {
		var result = {}, thisArg = arguments[2];
		callable(cb);
		forEach(obj, function (value, key, targetObj, index) {
			result[key] = call.call(cb, thisArg, value, key, targetObj, index);
		});
		return result;
	};
	
	},{"./for-each":41,"./valid-callable":54}],49:[function(require,module,exports){
	"use strict";
	
	var isValue = require("./is-value");
	
	var forEach = Array.prototype.forEach, create = Object.create;
	
	var process = function (src, obj) {
		var key;
		for (key in src) obj[key] = src[key];
	};
	
	// eslint-disable-next-line no-unused-vars
	module.exports = function (opts1 /*, …options*/) {
		var result = create(null);
		forEach.call(arguments, function (options) {
			if (!isValue(options)) return;
			process(Object(options), result);
		});
		return result;
	};
	
	},{"./is-value":44}],50:[function(require,module,exports){
	"use strict";
	
	var forEach = Array.prototype.forEach, create = Object.create;
	
	// eslint-disable-next-line no-unused-vars
	module.exports = function (arg /*, …args*/) {
		var set = create(null);
		forEach.call(arguments, function (name) {
			set[name] = true;
		});
		return set;
	};
	
	},{}],51:[function(require,module,exports){
	"use strict";
	
	module.exports = require("./is-implemented")()
		? Object.setPrototypeOf
		: require("./shim");
	
	},{"./is-implemented":52,"./shim":53}],52:[function(require,module,exports){
	"use strict";
	
	var create = Object.create, getPrototypeOf = Object.getPrototypeOf, plainObject = {};
	
	module.exports = function (/* CustomCreate*/) {
		var setPrototypeOf = Object.setPrototypeOf, customCreate = arguments[0] || create;
		if (typeof setPrototypeOf !== "function") return false;
		return getPrototypeOf(setPrototypeOf(customCreate(null), plainObject)) === plainObject;
	};
	
	},{}],53:[function(require,module,exports){
	/* eslint no-proto: "off" */
	
	// Big thanks to @WebReflection for sorting this out
	// https://gist.github.com/WebReflection/5593554
	
	"use strict";
	
	var isObject        = require("../is-object")
		, value           = require("../valid-value")
		, objIsPrototypeOf = Object.prototype.isPrototypeOf
		, defineProperty  = Object.defineProperty
		, nullDesc        = {
		configurable: true,
		enumerable: false,
		writable: true,
		value: undefined
	}
		, validate;
	
	validate = function (obj, prototype) {
		value(obj);
		if (prototype === null || isObject(prototype)) return obj;
		throw new TypeError("Prototype must be null or an object");
	};
	
	module.exports = (function (status) {
		var fn, set;
		if (!status) return null;
		if (status.level === 2) {
			if (status.set) {
				set = status.set;
				fn = function (obj, prototype) {
					set.call(validate(obj, prototype), prototype);
					return obj;
				};
			} else {
				fn = function (obj, prototype) {
					validate(obj, prototype).__proto__ = prototype;
					return obj;
				};
			}
		} else {
			fn = function self(obj, prototype) {
				var isNullBase;
				validate(obj, prototype);
				isNullBase = objIsPrototypeOf.call(self.nullPolyfill, obj);
				if (isNullBase) delete self.nullPolyfill.__proto__;
				if (prototype === null) prototype = self.nullPolyfill;
				obj.__proto__ = prototype;
				if (isNullBase) defineProperty(self.nullPolyfill, "__proto__", nullDesc);
				return obj;
			};
		}
		return Object.defineProperty(fn, "level", {
			configurable: false,
			enumerable: false,
			writable: false,
			value: status.level
		});
	}(
		(function () {
			var tmpObj1 = Object.create(null)
				, tmpObj2 = {}
				, set
				, desc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
	
			if (desc) {
				try {
					set = desc.set; // Opera crashes at this point
					set.call(tmpObj1, tmpObj2);
				} catch (ignore) {}
				if (Object.getPrototypeOf(tmpObj1) === tmpObj2) return { set: set, level: 2 };
			}
	
			tmpObj1.__proto__ = tmpObj2;
			if (Object.getPrototypeOf(tmpObj1) === tmpObj2) return { level: 2 };
	
			tmpObj1 = {};
			tmpObj1.__proto__ = tmpObj2;
			if (Object.getPrototypeOf(tmpObj1) === tmpObj2) return { level: 1 };
	
			return false;
		})()
	));
	
	require("../create");
	
	},{"../create":40,"../is-object":43,"../valid-value":55}],54:[function(require,module,exports){
	"use strict";
	
	module.exports = function (fn) {
		if (typeof fn !== "function") throw new TypeError(fn + " is not a function");
		return fn;
	};
	
	},{}],55:[function(require,module,exports){
	"use strict";
	
	var isValue = require("./is-value");
	
	module.exports = function (value) {
		if (!isValue(value)) throw new TypeError("Cannot use null or undefined");
		return value;
	};
	
	},{"./is-value":44}],56:[function(require,module,exports){
	"use strict";
	
	module.exports = require("./is-implemented")()
		? String.prototype.contains
		: require("./shim");
	
	},{"./is-implemented":57,"./shim":58}],57:[function(require,module,exports){
	"use strict";
	
	var str = "razdwatrzy";
	
	module.exports = function () {
		if (typeof str.contains !== "function") return false;
		return (str.contains("dwa") === true) && (str.contains("foo") === false);
	};
	
	},{}],58:[function(require,module,exports){
	"use strict";
	
	var indexOf = String.prototype.indexOf;
	
	module.exports = function (searchString/*, position*/) {
		return indexOf.call(this, searchString, arguments[1]) > -1;
	};
	
	},{}],59:[function(require,module,exports){
	"use strict";
	
	var objToString = Object.prototype.toString, id = objToString.call("");
	
	module.exports = function (value) {
		return (
			typeof value === "string" ||
			(value &&
				typeof value === "object" &&
				(value instanceof String || objToString.call(value) === id)) ||
			false
		);
	};
	
	},{}],60:[function(require,module,exports){
	"use strict";
	
	var setPrototypeOf = require("es5-ext/object/set-prototype-of")
		, contains       = require("es5-ext/string/#/contains")
		, d              = require("d")
		, Symbol         = require("es6-symbol")
		, Iterator       = require("./");
	
	var defineProperty = Object.defineProperty, ArrayIterator;
	
	ArrayIterator = module.exports = function (arr, kind) {
		if (!(this instanceof ArrayIterator)) throw new TypeError("Constructor requires 'new'");
		Iterator.call(this, arr);
		if (!kind) kind = "value";
		else if (contains.call(kind, "key+value")) kind = "key+value";
		else if (contains.call(kind, "key")) kind = "key";
		else kind = "value";
		defineProperty(this, "__kind__", d("", kind));
	};
	if (setPrototypeOf) setPrototypeOf(ArrayIterator, Iterator);
	
	// Internal %ArrayIteratorPrototype% doesn't expose its constructor
	delete ArrayIterator.prototype.constructor;
	
	ArrayIterator.prototype = Object.create(Iterator.prototype, {
		_resolve: d(function (i) {
			if (this.__kind__ === "value") return this.__list__[i];
			if (this.__kind__ === "key+value") return [i, this.__list__[i]];
			return i;
		})
	});
	defineProperty(ArrayIterator.prototype, Symbol.toStringTag, d("c", "Array Iterator"));
	
	},{"./":63,"d":16,"es5-ext/object/set-prototype-of":51,"es5-ext/string/#/contains":56,"es6-symbol":73}],61:[function(require,module,exports){
	"use strict";
	
	var isArguments = require("es5-ext/function/is-arguments")
		, callable    = require("es5-ext/object/valid-callable")
		, isString    = require("es5-ext/string/is-string")
		, get         = require("./get");
	
	var isArray = Array.isArray, call = Function.prototype.call, some = Array.prototype.some;
	
	module.exports = function (iterable, cb /*, thisArg*/) {
		var mode, thisArg = arguments[2], result, doBreak, broken, i, length, char, code;
		if (isArray(iterable) || isArguments(iterable)) mode = "array";
		else if (isString(iterable)) mode = "string";
		else iterable = get(iterable);
	
		callable(cb);
		doBreak = function () {
			broken = true;
		};
		if (mode === "array") {
			some.call(iterable, function (value) {
				call.call(cb, thisArg, value, doBreak);
				return broken;
			});
			return;
		}
		if (mode === "string") {
			length = iterable.length;
			for (i = 0; i < length; ++i) {
				char = iterable[i];
				if (i + 1 < length) {
					code = char.charCodeAt(0);
					if (code >= 0xd800 && code <= 0xdbff) char += iterable[++i];
				}
				call.call(cb, thisArg, char, doBreak);
				if (broken) break;
			}
			return;
		}
		result = iterable.next();
	
		while (!result.done) {
			call.call(cb, thisArg, result.value, doBreak);
			if (broken) return;
			result = iterable.next();
		}
	};
	
	},{"./get":62,"es5-ext/function/is-arguments":24,"es5-ext/object/valid-callable":54,"es5-ext/string/is-string":59}],62:[function(require,module,exports){
	"use strict";
	
	var isArguments    = require("es5-ext/function/is-arguments")
		, isString       = require("es5-ext/string/is-string")
		, ArrayIterator  = require("./array")
		, StringIterator = require("./string")
		, iterable       = require("./valid-iterable")
		, iteratorSymbol = require("es6-symbol").iterator;
	
	module.exports = function (obj) {
		if (typeof iterable(obj)[iteratorSymbol] === "function") return obj[iteratorSymbol]();
		if (isArguments(obj)) return new ArrayIterator(obj);
		if (isString(obj)) return new StringIterator(obj);
		return new ArrayIterator(obj);
	};
	
	},{"./array":60,"./string":65,"./valid-iterable":66,"es5-ext/function/is-arguments":24,"es5-ext/string/is-string":59,"es6-symbol":73}],63:[function(require,module,exports){
	"use strict";
	
	var clear    = require("es5-ext/array/#/clear")
		, assign   = require("es5-ext/object/assign")
		, callable = require("es5-ext/object/valid-callable")
		, value    = require("es5-ext/object/valid-value")
		, d        = require("d")
		, autoBind = require("d/auto-bind")
		, Symbol   = require("es6-symbol");
	
	var defineProperty = Object.defineProperty, defineProperties = Object.defineProperties, Iterator;
	
	module.exports = Iterator = function (list, context) {
		if (!(this instanceof Iterator)) throw new TypeError("Constructor requires 'new'");
		defineProperties(this, {
			__list__: d("w", value(list)),
			__context__: d("w", context),
			__nextIndex__: d("w", 0)
		});
		if (!context) return;
		callable(context.on);
		context.on("_add", this._onAdd);
		context.on("_delete", this._onDelete);
		context.on("_clear", this._onClear);
	};
	
	// Internal %IteratorPrototype% doesn't expose its constructor
	delete Iterator.prototype.constructor;
	
	defineProperties(
		Iterator.prototype,
		assign(
			{
				_next: d(function () {
					var i;
					if (!this.__list__) return undefined;
					if (this.__redo__) {
						i = this.__redo__.shift();
						if (i !== undefined) return i;
					}
					if (this.__nextIndex__ < this.__list__.length) return this.__nextIndex__++;
					this._unBind();
					return undefined;
				}),
				next: d(function () {
					return this._createResult(this._next());
				}),
				_createResult: d(function (i) {
					if (i === undefined) return { done: true, value: undefined };
					return { done: false, value: this._resolve(i) };
				}),
				_resolve: d(function (i) {
					return this.__list__[i];
				}),
				_unBind: d(function () {
					this.__list__ = null;
					delete this.__redo__;
					if (!this.__context__) return;
					this.__context__.off("_add", this._onAdd);
					this.__context__.off("_delete", this._onDelete);
					this.__context__.off("_clear", this._onClear);
					this.__context__ = null;
				}),
				toString: d(function () {
					return "[object " + (this[Symbol.toStringTag] || "Object") + "]";
				})
			},
			autoBind({
				_onAdd: d(function (index) {
					if (index >= this.__nextIndex__) return;
					++this.__nextIndex__;
					if (!this.__redo__) {
						defineProperty(this, "__redo__", d("c", [index]));
						return;
					}
					this.__redo__.forEach(function (redo, i) {
						if (redo >= index) this.__redo__[i] = ++redo;
					}, this);
					this.__redo__.push(index);
				}),
				_onDelete: d(function (index) {
					var i;
					if (index >= this.__nextIndex__) return;
					--this.__nextIndex__;
					if (!this.__redo__) return;
					i = this.__redo__.indexOf(index);
					if (i !== -1) this.__redo__.splice(i, 1);
					this.__redo__.forEach(function (redo, j) {
						if (redo > index) this.__redo__[j] = --redo;
					}, this);
				}),
				_onClear: d(function () {
					if (this.__redo__) clear.call(this.__redo__);
					this.__nextIndex__ = 0;
				})
			})
		)
	);
	
	defineProperty(
		Iterator.prototype,
		Symbol.iterator,
		d(function () {
			return this;
		})
	);
	
	},{"d":16,"d/auto-bind":15,"es5-ext/array/#/clear":19,"es5-ext/object/assign":36,"es5-ext/object/valid-callable":54,"es5-ext/object/valid-value":55,"es6-symbol":73}],64:[function(require,module,exports){
	"use strict";
	
	var isArguments = require("es5-ext/function/is-arguments")
		, isValue     = require("es5-ext/object/is-value")
		, isString    = require("es5-ext/string/is-string");
	
	var iteratorSymbol = require("es6-symbol").iterator
		, isArray        = Array.isArray;
	
	module.exports = function (value) {
		if (!isValue(value)) return false;
		if (isArray(value)) return true;
		if (isString(value)) return true;
		if (isArguments(value)) return true;
		return typeof value[iteratorSymbol] === "function";
	};
	
	},{"es5-ext/function/is-arguments":24,"es5-ext/object/is-value":44,"es5-ext/string/is-string":59,"es6-symbol":73}],65:[function(require,module,exports){
	// Thanks @mathiasbynens
	// http://mathiasbynens.be/notes/javascript-unicode#iterating-over-symbols
	
	"use strict";
	
	var setPrototypeOf = require("es5-ext/object/set-prototype-of")
		, d              = require("d")
		, Symbol         = require("es6-symbol")
		, Iterator       = require("./");
	
	var defineProperty = Object.defineProperty, StringIterator;
	
	StringIterator = module.exports = function (str) {
		if (!(this instanceof StringIterator)) throw new TypeError("Constructor requires 'new'");
		str = String(str);
		Iterator.call(this, str);
		defineProperty(this, "__length__", d("", str.length));
	};
	if (setPrototypeOf) setPrototypeOf(StringIterator, Iterator);
	
	// Internal %ArrayIteratorPrototype% doesn't expose its constructor
	delete StringIterator.prototype.constructor;
	
	StringIterator.prototype = Object.create(Iterator.prototype, {
		_next: d(function () {
			if (!this.__list__) return undefined;
			if (this.__nextIndex__ < this.__length__) return this.__nextIndex__++;
			this._unBind();
			return undefined;
		}),
		_resolve: d(function (i) {
			var char = this.__list__[i], code;
			if (this.__nextIndex__ === this.__length__) return char;
			code = char.charCodeAt(0);
			if (code >= 0xd800 && code <= 0xdbff) return char + this.__list__[this.__nextIndex__++];
			return char;
		})
	});
	defineProperty(StringIterator.prototype, Symbol.toStringTag, d("c", "String Iterator"));
	
	},{"./":63,"d":16,"es5-ext/object/set-prototype-of":51,"es6-symbol":73}],66:[function(require,module,exports){
	"use strict";
	
	var isIterable = require("./is-iterable");
	
	module.exports = function (value) {
		if (!isIterable(value)) throw new TypeError(value + " is not iterable");
		return value;
	};
	
	},{"./is-iterable":64}],67:[function(require,module,exports){
	'use strict';
	
	module.exports = require('./is-implemented')() ? Map : require('./polyfill');
	
	},{"./is-implemented":68,"./polyfill":72}],68:[function(require,module,exports){
	'use strict';
	
	module.exports = function () {
		var map, iterator, result;
		if (typeof Map !== 'function') return false;
		try {
			// WebKit doesn't support arguments and crashes
			map = new Map([['raz', 'one'], ['dwa', 'two'], ['trzy', 'three']]);
		} catch (e) {
			return false;
		}
		if (String(map) !== '[object Map]') return false;
		if (map.size !== 3) return false;
		if (typeof map.clear !== 'function') return false;
		if (typeof map.delete !== 'function') return false;
		if (typeof map.entries !== 'function') return false;
		if (typeof map.forEach !== 'function') return false;
		if (typeof map.get !== 'function') return false;
		if (typeof map.has !== 'function') return false;
		if (typeof map.keys !== 'function') return false;
		if (typeof map.set !== 'function') return false;
		if (typeof map.values !== 'function') return false;
	
		iterator = map.entries();
		result = iterator.next();
		if (result.done !== false) return false;
		if (!result.value) return false;
		if (result.value[0] !== 'raz') return false;
		if (result.value[1] !== 'one') return false;
	
		return true;
	};
	
	},{}],69:[function(require,module,exports){
	// Exports true if environment provides native `Map` implementation,
	// whatever that is.
	
	'use strict';
	
	module.exports = (function () {
		if (typeof Map === 'undefined') return false;
		return (Object.prototype.toString.call(new Map()) === '[object Map]');
	}());
	
	},{}],70:[function(require,module,exports){
	'use strict';
	
	module.exports = require('es5-ext/object/primitive-set')('key',
		'value', 'key+value');
	
	},{"es5-ext/object/primitive-set":50}],71:[function(require,module,exports){
	'use strict';
	
	var setPrototypeOf    = require('es5-ext/object/set-prototype-of')
		, d                 = require('d')
		, Iterator          = require('es6-iterator')
		, toStringTagSymbol = require('es6-symbol').toStringTag
		, kinds             = require('./iterator-kinds')
	
		, defineProperties = Object.defineProperties
		, unBind = Iterator.prototype._unBind
		, MapIterator;
	
	MapIterator = module.exports = function (map, kind) {
		if (!(this instanceof MapIterator)) return new MapIterator(map, kind);
		Iterator.call(this, map.__mapKeysData__, map);
		if (!kind || !kinds[kind]) kind = 'key+value';
		defineProperties(this, {
			__kind__: d('', kind),
			__values__: d('w', map.__mapValuesData__)
		});
	};
	if (setPrototypeOf) setPrototypeOf(MapIterator, Iterator);
	
	MapIterator.prototype = Object.create(Iterator.prototype, {
		constructor: d(MapIterator),
		_resolve: d(function (i) {
			if (this.__kind__ === 'value') return this.__values__[i];
			if (this.__kind__ === 'key') return this.__list__[i];
			return [this.__list__[i], this.__values__[i]];
		}),
		_unBind: d(function () {
			this.__values__ = null;
			unBind.call(this);
		}),
		toString: d(function () { return '[object Map Iterator]'; })
	});
	Object.defineProperty(MapIterator.prototype, toStringTagSymbol,
		d('c', 'Map Iterator'));
	
	},{"./iterator-kinds":70,"d":16,"es5-ext/object/set-prototype-of":51,"es6-iterator":63,"es6-symbol":73}],72:[function(require,module,exports){
	'use strict';
	
	var clear          = require('es5-ext/array/#/clear')
		, eIndexOf       = require('es5-ext/array/#/e-index-of')
		, setPrototypeOf = require('es5-ext/object/set-prototype-of')
		, callable       = require('es5-ext/object/valid-callable')
		, validValue     = require('es5-ext/object/valid-value')
		, d              = require('d')
		, ee             = require('event-emitter')
		, Symbol         = require('es6-symbol')
		, iterator       = require('es6-iterator/valid-iterable')
		, forOf          = require('es6-iterator/for-of')
		, Iterator       = require('./lib/iterator')
		, isNative       = require('./is-native-implemented')
	
		, call = Function.prototype.call
		, defineProperties = Object.defineProperties, getPrototypeOf = Object.getPrototypeOf
		, MapPoly;
	
	module.exports = MapPoly = function (/*iterable*/) {
		var iterable = arguments[0], keys, values, self;
		if (!(this instanceof MapPoly)) throw new TypeError('Constructor requires \'new\'');
		if (isNative && setPrototypeOf && (Map !== MapPoly)) {
			self = setPrototypeOf(new Map(), getPrototypeOf(this));
		} else {
			self = this;
		}
		if (iterable != null) iterator(iterable);
		defineProperties(self, {
			__mapKeysData__: d('c', keys = []),
			__mapValuesData__: d('c', values = [])
		});
		if (!iterable) return self;
		forOf(iterable, function (value) {
			var key = validValue(value)[0];
			value = value[1];
			if (eIndexOf.call(keys, key) !== -1) return;
			keys.push(key);
			values.push(value);
		}, self);
		return self;
	};
	
	if (isNative) {
		if (setPrototypeOf) setPrototypeOf(MapPoly, Map);
		MapPoly.prototype = Object.create(Map.prototype, {
			constructor: d(MapPoly)
		});
	}
	
	ee(defineProperties(MapPoly.prototype, {
		clear: d(function () {
			if (!this.__mapKeysData__.length) return;
			clear.call(this.__mapKeysData__);
			clear.call(this.__mapValuesData__);
			this.emit('_clear');
		}),
		delete: d(function (key) {
			var index = eIndexOf.call(this.__mapKeysData__, key);
			if (index === -1) return false;
			this.__mapKeysData__.splice(index, 1);
			this.__mapValuesData__.splice(index, 1);
			this.emit('_delete', index, key);
			return true;
		}),
		entries: d(function () { return new Iterator(this, 'key+value'); }),
		forEach: d(function (cb/*, thisArg*/) {
			var thisArg = arguments[1], iterator, result;
			callable(cb);
			iterator = this.entries();
			result = iterator._next();
			while (result !== undefined) {
				call.call(cb, thisArg, this.__mapValuesData__[result],
					this.__mapKeysData__[result], this);
				result = iterator._next();
			}
		}),
		get: d(function (key) {
			var index = eIndexOf.call(this.__mapKeysData__, key);
			if (index === -1) return;
			return this.__mapValuesData__[index];
		}),
		has: d(function (key) {
			return (eIndexOf.call(this.__mapKeysData__, key) !== -1);
		}),
		keys: d(function () { return new Iterator(this, 'key'); }),
		set: d(function (key, value) {
			var index = eIndexOf.call(this.__mapKeysData__, key), emit;
			if (index === -1) {
				index = this.__mapKeysData__.push(key) - 1;
				emit = true;
			}
			this.__mapValuesData__[index] = value;
			if (emit) this.emit('_add', index, key);
			return this;
		}),
		size: d.gs(function () { return this.__mapKeysData__.length; }),
		values: d(function () { return new Iterator(this, 'value'); }),
		toString: d(function () { return '[object Map]'; })
	}));
	Object.defineProperty(MapPoly.prototype, Symbol.iterator, d(function () {
		return this.entries();
	}));
	Object.defineProperty(MapPoly.prototype, Symbol.toStringTag, d('c', 'Map'));
	
	},{"./is-native-implemented":69,"./lib/iterator":71,"d":16,"es5-ext/array/#/clear":19,"es5-ext/array/#/e-index-of":20,"es5-ext/object/set-prototype-of":51,"es5-ext/object/valid-callable":54,"es5-ext/object/valid-value":55,"es6-iterator/for-of":61,"es6-iterator/valid-iterable":66,"es6-symbol":73,"event-emitter":78}],73:[function(require,module,exports){
	'use strict';
	
	module.exports = require('./is-implemented')() ? Symbol : require('./polyfill');
	
	},{"./is-implemented":74,"./polyfill":76}],74:[function(require,module,exports){
	'use strict';
	
	var validTypes = { object: true, symbol: true };
	
	module.exports = function () {
		var symbol;
		if (typeof Symbol !== 'function') return false;
		symbol = Symbol('test symbol');
		try { String(symbol); } catch (e) { return false; }
	
		// Return 'true' also for polyfills
		if (!validTypes[typeof Symbol.iterator]) return false;
		if (!validTypes[typeof Symbol.toPrimitive]) return false;
		if (!validTypes[typeof Symbol.toStringTag]) return false;
	
		return true;
	};
	
	},{}],75:[function(require,module,exports){
	'use strict';
	
	module.exports = function (x) {
		if (!x) return false;
		if (typeof x === 'symbol') return true;
		if (!x.constructor) return false;
		if (x.constructor.name !== 'Symbol') return false;
		return (x[x.constructor.toStringTag] === 'Symbol');
	};
	
	},{}],76:[function(require,module,exports){
	// ES2015 Symbol polyfill for environments that do not (or partially) support it
	
	'use strict';
	
	var d              = require('d')
		, validateSymbol = require('./validate-symbol')
	
		, create = Object.create, defineProperties = Object.defineProperties
		, defineProperty = Object.defineProperty, objPrototype = Object.prototype
		, NativeSymbol, SymbolPolyfill, HiddenSymbol, globalSymbols = create(null)
		, isNativeSafe;
	
	if (typeof Symbol === 'function') {
		NativeSymbol = Symbol;
		try {
			String(NativeSymbol());
			isNativeSafe = true;
		} catch (ignore) {}
	}
	
	var generateName = (function () {
		var created = create(null);
		return function (desc) {
			var postfix = 0, name, ie11BugWorkaround;
			while (created[desc + (postfix || '')]) ++postfix;
			desc += (postfix || '');
			created[desc] = true;
			name = '@@' + desc;
			defineProperty(objPrototype, name, d.gs(null, function (value) {
				// For IE11 issue see:
				// https://connect.microsoft.com/IE/feedbackdetail/view/1928508/
				//    ie11-broken-getters-on-dom-objects
				// https://github.com/medikoo/es6-symbol/issues/12
				if (ie11BugWorkaround) return;
				ie11BugWorkaround = true;
				defineProperty(this, name, d(value));
				ie11BugWorkaround = false;
			}));
			return name;
		};
	}());
	
	// Internal constructor (not one exposed) for creating Symbol instances.
	// This one is used to ensure that `someSymbol instanceof Symbol` always return false
	HiddenSymbol = function Symbol(description) {
		if (this instanceof HiddenSymbol) throw new TypeError('Symbol is not a constructor');
		return SymbolPolyfill(description);
	};
	
	// Exposed `Symbol` constructor
	// (returns instances of HiddenSymbol)
	module.exports = SymbolPolyfill = function Symbol(description) {
		var symbol;
		if (this instanceof Symbol) throw new TypeError('Symbol is not a constructor');
		if (isNativeSafe) return NativeSymbol(description);
		symbol = create(HiddenSymbol.prototype);
		description = (description === undefined ? '' : String(description));
		return defineProperties(symbol, {
			__description__: d('', description),
			__name__: d('', generateName(description))
		});
	};
	defineProperties(SymbolPolyfill, {
		for: d(function (key) {
			if (globalSymbols[key]) return globalSymbols[key];
			return (globalSymbols[key] = SymbolPolyfill(String(key)));
		}),
		keyFor: d(function (s) {
			var key;
			validateSymbol(s);
			for (key in globalSymbols) if (globalSymbols[key] === s) return key;
		}),
	
		// To ensure proper interoperability with other native functions (e.g. Array.from)
		// fallback to eventual native implementation of given symbol
		hasInstance: d('', (NativeSymbol && NativeSymbol.hasInstance) || SymbolPolyfill('hasInstance')),
		isConcatSpreadable: d('', (NativeSymbol && NativeSymbol.isConcatSpreadable) ||
			SymbolPolyfill('isConcatSpreadable')),
		iterator: d('', (NativeSymbol && NativeSymbol.iterator) || SymbolPolyfill('iterator')),
		match: d('', (NativeSymbol && NativeSymbol.match) || SymbolPolyfill('match')),
		replace: d('', (NativeSymbol && NativeSymbol.replace) || SymbolPolyfill('replace')),
		search: d('', (NativeSymbol && NativeSymbol.search) || SymbolPolyfill('search')),
		species: d('', (NativeSymbol && NativeSymbol.species) || SymbolPolyfill('species')),
		split: d('', (NativeSymbol && NativeSymbol.split) || SymbolPolyfill('split')),
		toPrimitive: d('', (NativeSymbol && NativeSymbol.toPrimitive) || SymbolPolyfill('toPrimitive')),
		toStringTag: d('', (NativeSymbol && NativeSymbol.toStringTag) || SymbolPolyfill('toStringTag')),
		unscopables: d('', (NativeSymbol && NativeSymbol.unscopables) || SymbolPolyfill('unscopables'))
	});
	
	// Internal tweaks for real symbol producer
	defineProperties(HiddenSymbol.prototype, {
		constructor: d(SymbolPolyfill),
		toString: d('', function () { return this.__name__; })
	});
	
	// Proper implementation of methods exposed on Symbol.prototype
	// They won't be accessible on produced symbol instances as they derive from HiddenSymbol.prototype
	defineProperties(SymbolPolyfill.prototype, {
		toString: d(function () { return 'Symbol (' + validateSymbol(this).__description__ + ')'; }),
		valueOf: d(function () { return validateSymbol(this); })
	});
	defineProperty(SymbolPolyfill.prototype, SymbolPolyfill.toPrimitive, d('', function () {
		var symbol = validateSymbol(this);
		if (typeof symbol === 'symbol') return symbol;
		return symbol.toString();
	}));
	defineProperty(SymbolPolyfill.prototype, SymbolPolyfill.toStringTag, d('c', 'Symbol'));
	
	// Proper implementaton of toPrimitive and toStringTag for returned symbol instances
	defineProperty(HiddenSymbol.prototype, SymbolPolyfill.toStringTag,
		d('c', SymbolPolyfill.prototype[SymbolPolyfill.toStringTag]));
	
	// Note: It's important to define `toPrimitive` as last one, as some implementations
	// implement `toPrimitive` natively without implementing `toStringTag` (or other specified symbols)
	// And that may invoke error in definition flow:
	// See: https://github.com/medikoo/es6-symbol/issues/13#issuecomment-164146149
	defineProperty(HiddenSymbol.prototype, SymbolPolyfill.toPrimitive,
		d('c', SymbolPolyfill.prototype[SymbolPolyfill.toPrimitive]));
	
	},{"./validate-symbol":77,"d":16}],77:[function(require,module,exports){
	'use strict';
	
	var isSymbol = require('./is-symbol');
	
	module.exports = function (value) {
		if (!isSymbol(value)) throw new TypeError(value + " is not a symbol");
		return value;
	};
	
	},{"./is-symbol":75}],78:[function(require,module,exports){
	'use strict';
	
	var d        = require('d')
		, callable = require('es5-ext/object/valid-callable')
	
		, apply = Function.prototype.apply, call = Function.prototype.call
		, create = Object.create, defineProperty = Object.defineProperty
		, defineProperties = Object.defineProperties
		, hasOwnProperty = Object.prototype.hasOwnProperty
		, descriptor = { configurable: true, enumerable: false, writable: true }
	
		, on, once, off, emit, methods, descriptors, base;
	
	on = function (type, listener) {
		var data;
	
		callable(listener);
	
		if (!hasOwnProperty.call(this, '__ee__')) {
			data = descriptor.value = create(null);
			defineProperty(this, '__ee__', descriptor);
			descriptor.value = null;
		} else {
			data = this.__ee__;
		}
		if (!data[type]) data[type] = listener;
		else if (typeof data[type] === 'object') data[type].push(listener);
		else data[type] = [data[type], listener];
	
		return this;
	};
	
	once = function (type, listener) {
		var once, self;
	
		callable(listener);
		self = this;
		on.call(this, type, once = function () {
			off.call(self, type, once);
			apply.call(listener, this, arguments);
		});
	
		once.__eeOnceListener__ = listener;
		return this;
	};
	
	off = function (type, listener) {
		var data, listeners, candidate, i;
	
		callable(listener);
	
		if (!hasOwnProperty.call(this, '__ee__')) return this;
		data = this.__ee__;
		if (!data[type]) return this;
		listeners = data[type];
	
		if (typeof listeners === 'object') {
			for (i = 0; (candidate = listeners[i]); ++i) {
				if ((candidate === listener) ||
						(candidate.__eeOnceListener__ === listener)) {
					if (listeners.length === 2) data[type] = listeners[i ? 0 : 1];
					else listeners.splice(i, 1);
				}
			}
		} else {
			if ((listeners === listener) ||
					(listeners.__eeOnceListener__ === listener)) {
				delete data[type];
			}
		}
	
		return this;
	};
	
	emit = function (type) {
		var i, l, listener, listeners, args;
	
		if (!hasOwnProperty.call(this, '__ee__')) return;
		listeners = this.__ee__[type];
		if (!listeners) return;
	
		if (typeof listeners === 'object') {
			l = arguments.length;
			args = new Array(l - 1);
			for (i = 1; i < l; ++i) args[i - 1] = arguments[i];
	
			listeners = listeners.slice();
			for (i = 0; (listener = listeners[i]); ++i) {
				apply.call(listener, this, args);
			}
		} else {
			switch (arguments.length) {
			case 1:
				call.call(listeners, this);
				break;
			case 2:
				call.call(listeners, this, arguments[1]);
				break;
			case 3:
				call.call(listeners, this, arguments[1], arguments[2]);
				break;
			default:
				l = arguments.length;
				args = new Array(l - 1);
				for (i = 1; i < l; ++i) {
					args[i - 1] = arguments[i];
				}
				apply.call(listeners, this, args);
			}
		}
	};
	
	methods = {
		on: on,
		once: once,
		off: off,
		emit: emit
	};
	
	descriptors = {
		on: d(on),
		once: d(once),
		off: d(off),
		emit: d(emit)
	};
	
	base = defineProperties({}, descriptors);
	
	module.exports = exports = function (o) {
		return (o == null) ? create(base) : defineProperties(Object(o), descriptors);
	};
	exports.methods = methods;
	
	},{"d":16,"es5-ext/object/valid-callable":54}],79:[function(require,module,exports){
	exports.read = function (buffer, offset, isLE, mLen, nBytes) {
		var e, m
		var eLen = (nBytes * 8) - mLen - 1
		var eMax = (1 << eLen) - 1
		var eBias = eMax >> 1
		var nBits = -7
		var i = isLE ? (nBytes - 1) : 0
		var d = isLE ? -1 : 1
		var s = buffer[offset + i]
	
		i += d
	
		e = s & ((1 << (-nBits)) - 1)
		s >>= (-nBits)
		nBits += eLen
		for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}
	
		m = e & ((1 << (-nBits)) - 1)
		e >>= (-nBits)
		nBits += mLen
		for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}
	
		if (e === 0) {
			e = 1 - eBias
		} else if (e === eMax) {
			return m ? NaN : ((s ? -1 : 1) * Infinity)
		} else {
			m = m + Math.pow(2, mLen)
			e = e - eBias
		}
		return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
	}
	
	exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
		var e, m, c
		var eLen = (nBytes * 8) - mLen - 1
		var eMax = (1 << eLen) - 1
		var eBias = eMax >> 1
		var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
		var i = isLE ? 0 : (nBytes - 1)
		var d = isLE ? 1 : -1
		var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
	
		value = Math.abs(value)
	
		if (isNaN(value) || value === Infinity) {
			m = isNaN(value) ? 1 : 0
			e = eMax
		} else {
			e = Math.floor(Math.log(value) / Math.LN2)
			if (value * (c = Math.pow(2, -e)) < 1) {
				e--
				c *= 2
			}
			if (e + eBias >= 1) {
				value += rt / c
			} else {
				value += rt * Math.pow(2, 1 - eBias)
			}
			if (value * c >= 2) {
				e++
				c /= 2
			}
	
			if (e + eBias >= eMax) {
				m = 0
				e = eMax
			} else if (e + eBias >= 1) {
				m = ((value * c) - 1) * Math.pow(2, mLen)
				e = e + eBias
			} else {
				m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
				e = 0
			}
		}
	
		for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
	
		e = (e << mLen) | m
		eLen += mLen
		for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
	
		buffer[offset + i - d] |= s * 128
	}
	
	},{}],80:[function(require,module,exports){
	if (typeof Object.create === 'function') {
		// implementation from standard node.js 'util' module
		module.exports = function inherits(ctor, superCtor) {
			ctor.super_ = superCtor
			ctor.prototype = Object.create(superCtor.prototype, {
				constructor: {
					value: ctor,
					enumerable: false,
					writable: true,
					configurable: true
				}
			});
		};
	} else {
		// old school shim for old browsers
		module.exports = function inherits(ctor, superCtor) {
			ctor.super_ = superCtor
			var TempCtor = function () {}
			TempCtor.prototype = superCtor.prototype
			ctor.prototype = new TempCtor()
			ctor.prototype.constructor = ctor
		}
	}
	
	},{}],81:[function(require,module,exports){
	/*!
	 * Determine if an object is a Buffer
	 *
	 * @author   Feross Aboukhadijeh <https://feross.org>
	 * @license  MIT
	 */
	
	// The _isBuffer check is for Safari 5-7 support, because it's missing
	// Object.prototype.constructor. Remove this eventually
	module.exports = function (obj) {
		return obj != null && (isBuffer(obj) || isSlowBuffer(obj) || !!obj._isBuffer)
	}
	
	function isBuffer (obj) {
		return !!obj.constructor && typeof obj.constructor.isBuffer === 'function' && obj.constructor.isBuffer(obj)
	}
	
	// For Node v0.10 support. Remove this eventually.
	function isSlowBuffer (obj) {
		return typeof obj.readFloatLE === 'function' && typeof obj.slice === 'function' && isBuffer(obj.slice(0, 0))
	}
	
	},{}],82:[function(require,module,exports){
	'use strict'
	
	var Buffer = require('safe-buffer').Buffer
	
	/* Protocol - protocol constants */
	var protocol = module.exports
	
	/* Command code => mnemonic */
	protocol.types = {
		0: 'reserved',
		1: 'connect',
		2: 'connack',
		3: 'publish',
		4: 'puback',
		5: 'pubrec',
		6: 'pubrel',
		7: 'pubcomp',
		8: 'subscribe',
		9: 'suback',
		10: 'unsubscribe',
		11: 'unsuback',
		12: 'pingreq',
		13: 'pingresp',
		14: 'disconnect',
		15: 'auth'
	}
	
	/* Mnemonic => Command code */
	protocol.codes = {}
	for (var k in protocol.types) {
		var v = protocol.types[k]
		protocol.codes[v] = k
	}
	
	/* Header */
	protocol.CMD_SHIFT = 4
	protocol.CMD_MASK = 0xF0
	protocol.DUP_MASK = 0x08
	protocol.QOS_MASK = 0x03
	protocol.QOS_SHIFT = 1
	protocol.RETAIN_MASK = 0x01
	
	/* Length */
	protocol.LENGTH_MASK = 0x7F
	protocol.LENGTH_FIN_MASK = 0x80
	
	/* Connack */
	protocol.SESSIONPRESENT_MASK = 0x01
	protocol.SESSIONPRESENT_HEADER = Buffer.from([protocol.SESSIONPRESENT_MASK])
	protocol.CONNACK_HEADER = Buffer.from([protocol.codes['connack'] << protocol.CMD_SHIFT])
	
	/* Connect */
	protocol.USERNAME_MASK = 0x80
	protocol.PASSWORD_MASK = 0x40
	protocol.WILL_RETAIN_MASK = 0x20
	protocol.WILL_QOS_MASK = 0x18
	protocol.WILL_QOS_SHIFT = 3
	protocol.WILL_FLAG_MASK = 0x04
	protocol.CLEAN_SESSION_MASK = 0x02
	protocol.CONNECT_HEADER = Buffer.from([protocol.codes['connect'] << protocol.CMD_SHIFT])
	
	/* Properties */
	protocol.properties = {
		sessionExpiryInterval: 17,
		willDelayInterval: 24,
		receiveMaximum: 33,
		maximumPacketSize: 39,
		topicAliasMaximum: 34,
		requestResponseInformation: 25,
		requestProblemInformation: 23,
		userProperties: 38,
		authenticationMethod: 21,
		authenticationData: 22,
		payloadFormatIndicator: 1,
		messageExpiryInterval: 2,
		contentType: 3,
		responseTopic: 8,
		correlationData: 9,
		maximumQoS: 36,
		retainAvailable: 37,
		assignedClientIdentifier: 18,
		reasonString: 31,
		wildcardSubscriptionAvailable: 40,
		subscriptionIdentifiersAvailable: 41,
		sharedSubscriptionAvailable: 42,
		serverKeepAlive: 19,
		responseInformation: 26,
		serverReference: 28,
		topicAlias: 35,
		subscriptionIdentifier: 11
	}
	protocol.propertiesCodes = {}
	for (var prop in protocol.properties) {
		var id = protocol.properties[prop]
		protocol.propertiesCodes[id] = prop
	}
	protocol.propertiesTypes = {
		sessionExpiryInterval: 'int32',
		willDelayInterval: 'int32',
		receiveMaximum: 'int16',
		maximumPacketSize: 'int32',
		topicAliasMaximum: 'int16',
		requestResponseInformation: 'byte',
		requestProblemInformation: 'byte',
		userProperties: 'pair',
		authenticationMethod: 'string',
		authenticationData: 'binary',
		payloadFormatIndicator: 'byte',
		messageExpiryInterval: 'int32',
		contentType: 'string',
		responseTopic: 'string',
		correlationData: 'binary',
		maximumQoS: 'int8',
		retainAvailable: 'byte',
		assignedClientIdentifier: 'string',
		reasonString: 'string',
		wildcardSubscriptionAvailable: 'byte',
		subscriptionIdentifiersAvailable: 'byte',
		sharedSubscriptionAvailable: 'byte',
		serverKeepAlive: 'int32',
		responseInformation: 'string',
		serverReference: 'string',
		topicAlias: 'int16',
		subscriptionIdentifier: 'var'
	}
	
	function genHeader (type) {
		return [0, 1, 2].map(function (qos) {
			return [0, 1].map(function (dup) {
				return [0, 1].map(function (retain) {
					var buf = new Buffer(1)
					buf.writeUInt8(
						protocol.codes[type] << protocol.CMD_SHIFT |
						(dup ? protocol.DUP_MASK : 0) |
						qos << protocol.QOS_SHIFT | retain, 0, true)
					return buf
				})
			})
		})
	}
	
	/* Publish */
	protocol.PUBLISH_HEADER = genHeader('publish')
	
	/* Subscribe */
	protocol.SUBSCRIBE_HEADER = genHeader('subscribe')
	protocol.SUBSCRIBE_OPTIONS_QOS_MASK = 0x03
	protocol.SUBSCRIBE_OPTIONS_NL_MASK = 0x01
	protocol.SUBSCRIBE_OPTIONS_NL_SHIFT = 2
	protocol.SUBSCRIBE_OPTIONS_RAP_MASK = 0x01
	protocol.SUBSCRIBE_OPTIONS_RAP_SHIFT = 3
	protocol.SUBSCRIBE_OPTIONS_RH_MASK = 0x03
	protocol.SUBSCRIBE_OPTIONS_RH_SHIFT = 4
	protocol.SUBSCRIBE_OPTIONS_RH = [0x00, 0x10, 0x20]
	protocol.SUBSCRIBE_OPTIONS_NL = 0x04
	protocol.SUBSCRIBE_OPTIONS_RAP = 0x08
	protocol.SUBSCRIBE_OPTIONS_QOS = [0x00, 0x01, 0x02]
	
	/* Unsubscribe */
	protocol.UNSUBSCRIBE_HEADER = genHeader('unsubscribe')
	
	/* Confirmations */
	protocol.ACKS = {
		unsuback: genHeader('unsuback'),
		puback: genHeader('puback'),
		pubcomp: genHeader('pubcomp'),
		pubrel: genHeader('pubrel'),
		pubrec: genHeader('pubrec')
	}
	
	protocol.SUBACK_HEADER = Buffer.from([protocol.codes['suback'] << protocol.CMD_SHIFT])
	
	/* Protocol versions */
	protocol.VERSION3 = Buffer.from([3])
	protocol.VERSION4 = Buffer.from([4])
	protocol.VERSION5 = Buffer.from([5])
	
	/* QoS */
	protocol.QOS = [0, 1, 2].map(function (qos) {
		return Buffer.from([qos])
	})
	
	/* Empty packets */
	protocol.EMPTY = {
		pingreq: Buffer.from([protocol.codes['pingreq'] << 4, 0]),
		pingresp: Buffer.from([protocol.codes['pingresp'] << 4, 0]),
		disconnect: Buffer.from([protocol.codes['disconnect'] << 4, 0])
	}
	
	},{"safe-buffer":110}],83:[function(require,module,exports){
	'use strict'
	
	var Buffer = require('safe-buffer').Buffer
	var writeToStream = require('./writeToStream')
	var EE = require('events').EventEmitter
	var inherits = require('inherits')
	
	function generate (packet, opts) {
		var stream = new Accumulator()
		writeToStream(packet, stream, opts)
		return stream.concat()
	}
	
	function Accumulator () {
		this._array = new Array(20)
		this._i = 0
	}
	
	inherits(Accumulator, EE)
	
	Accumulator.prototype.write = function (chunk) {
		this._array[this._i++] = chunk
		return true
	}
	
	Accumulator.prototype.concat = function () {
		var length = 0
		var lengths = new Array(this._array.length)
		var list = this._array
		var pos = 0
		var i
		var result
	
		for (i = 0; i < list.length && list[i] !== undefined; i++) {
			if (typeof list[i] !== 'string') lengths[i] = list[i].length
			else lengths[i] = Buffer.byteLength(list[i])
	
			length += lengths[i]
		}
	
		result = Buffer.allocUnsafe(length)
	
		for (i = 0; i < list.length && list[i] !== undefined; i++) {
			if (typeof list[i] !== 'string') {
				list[i].copy(result, pos)
				pos += lengths[i]
			} else {
				result.write(list[i], pos)
				pos += lengths[i]
			}
		}
	
		return result
	}
	
	module.exports = generate
	
	},{"./writeToStream":89,"events":13,"inherits":80,"safe-buffer":110}],84:[function(require,module,exports){
	'use strict'
	
	exports.parser = require('./parser')
	exports.generate = require('./generate')
	exports.writeToStream = require('./writeToStream')
	
	},{"./generate":83,"./parser":88,"./writeToStream":89}],85:[function(require,module,exports){
	var DuplexStream = require('readable-stream/duplex')
		, util         = require('util')
		, Buffer       = require('safe-buffer').Buffer
	
	
	function BufferList (callback) {
		if (!(this instanceof BufferList))
			return new BufferList(callback)
	
		this._bufs  = []
		this.length = 0
	
		if (typeof callback == 'function') {
			this._callback = callback
	
			var piper = function piper (err) {
				if (this._callback) {
					this._callback(err)
					this._callback = null
				}
			}.bind(this)
	
			this.on('pipe', function onPipe (src) {
				src.on('error', piper)
			})
			this.on('unpipe', function onUnpipe (src) {
				src.removeListener('error', piper)
			})
		} else {
			this.append(callback)
		}
	
		DuplexStream.call(this)
	}
	
	
	util.inherits(BufferList, DuplexStream)
	
	
	BufferList.prototype._offset = function _offset (offset) {
		var tot = 0, i = 0, _t
		if (offset === 0) return [ 0, 0 ]
		for (; i < this._bufs.length; i++) {
			_t = tot + this._bufs[i].length
			if (offset < _t || i == this._bufs.length - 1)
				return [ i, offset - tot ]
			tot = _t
		}
	}
	
	
	BufferList.prototype.append = function append (buf) {
		var i = 0
	
		if (Buffer.isBuffer(buf)) {
			this._appendBuffer(buf);
		} else if (Array.isArray(buf)) {
			for (; i < buf.length; i++)
				this.append(buf[i])
		} else if (buf instanceof BufferList) {
			// unwrap argument into individual BufferLists
			for (; i < buf._bufs.length; i++)
				this.append(buf._bufs[i])
		} else if (buf != null) {
			// coerce number arguments to strings, since Buffer(number) does
			// uninitialized memory allocation
			if (typeof buf == 'number')
				buf = buf.toString()
	
			this._appendBuffer(Buffer.from(buf));
		}
	
		return this
	}
	
	
	BufferList.prototype._appendBuffer = function appendBuffer (buf) {
		this._bufs.push(buf)
		this.length += buf.length
	}
	
	
	BufferList.prototype._write = function _write (buf, encoding, callback) {
		this._appendBuffer(buf)
	
		if (typeof callback == 'function')
			callback()
	}
	
	
	BufferList.prototype._read = function _read (size) {
		if (!this.length)
			return this.push(null)
	
		size = Math.min(size, this.length)
		this.push(this.slice(0, size))
		this.consume(size)
	}
	
	
	BufferList.prototype.end = function end (chunk) {
		DuplexStream.prototype.end.call(this, chunk)
	
		if (this._callback) {
			this._callback(null, this.slice())
			this._callback = null
		}
	}
	
	
	BufferList.prototype.get = function get (index) {
		return this.slice(index, index + 1)[0]
	}
	
	
	BufferList.prototype.slice = function slice (start, end) {
		if (typeof start == 'number' && start < 0)
			start += this.length
		if (typeof end == 'number' && end < 0)
			end += this.length
		return this.copy(null, 0, start, end)
	}
	
	
	BufferList.prototype.copy = function copy (dst, dstStart, srcStart, srcEnd) {
		if (typeof srcStart != 'number' || srcStart < 0)
			srcStart = 0
		if (typeof srcEnd != 'number' || srcEnd > this.length)
			srcEnd = this.length
		if (srcStart >= this.length)
			return dst || Buffer.alloc(0)
		if (srcEnd <= 0)
			return dst || Buffer.alloc(0)
	
		var copy   = !!dst
			, off    = this._offset(srcStart)
			, len    = srcEnd - srcStart
			, bytes  = len
			, bufoff = (copy && dstStart) || 0
			, start  = off[1]
			, l
			, i
	
		// copy/slice everything
		if (srcStart === 0 && srcEnd == this.length) {
			if (!copy) { // slice, but full concat if multiple buffers
				return this._bufs.length === 1
					? this._bufs[0]
					: Buffer.concat(this._bufs, this.length)
			}
	
			// copy, need to copy individual buffers
			for (i = 0; i < this._bufs.length; i++) {
				this._bufs[i].copy(dst, bufoff)
				bufoff += this._bufs[i].length
			}
	
			return dst
		}
	
		// easy, cheap case where it's a subset of one of the buffers
		if (bytes <= this._bufs[off[0]].length - start) {
			return copy
				? this._bufs[off[0]].copy(dst, dstStart, start, start + bytes)
				: this._bufs[off[0]].slice(start, start + bytes)
		}
	
		if (!copy) // a slice, we need something to copy in to
			dst = Buffer.allocUnsafe(len)
	
		for (i = off[0]; i < this._bufs.length; i++) {
			l = this._bufs[i].length - start
	
			if (bytes > l) {
				this._bufs[i].copy(dst, bufoff, start)
			} else {
				this._bufs[i].copy(dst, bufoff, start, start + bytes)
				break
			}
	
			bufoff += l
			bytes -= l
	
			if (start)
				start = 0
		}
	
		return dst
	}
	
	BufferList.prototype.shallowSlice = function shallowSlice (start, end) {
		start = start || 0
		end = end || this.length
	
		if (start < 0)
			start += this.length
		if (end < 0)
			end += this.length
	
		var startOffset = this._offset(start)
			, endOffset = this._offset(end)
			, buffers = this._bufs.slice(startOffset[0], endOffset[0] + 1)
	
		if (endOffset[1] == 0)
			buffers.pop()
		else
			buffers[buffers.length-1] = buffers[buffers.length-1].slice(0, endOffset[1])
	
		if (startOffset[1] != 0)
			buffers[0] = buffers[0].slice(startOffset[1])
	
		return new BufferList(buffers)
	}
	
	BufferList.prototype.toString = function toString (encoding, start, end) {
		return this.slice(start, end).toString(encoding)
	}
	
	BufferList.prototype.consume = function consume (bytes) {
		while (this._bufs.length) {
			if (bytes >= this._bufs[0].length) {
				bytes -= this._bufs[0].length
				this.length -= this._bufs[0].length
				this._bufs.shift()
			} else {
				this._bufs[0] = this._bufs[0].slice(bytes)
				this.length -= bytes
				break
			}
		}
		return this
	}
	
	
	BufferList.prototype.duplicate = function duplicate () {
		var i = 0
			, copy = new BufferList()
	
		for (; i < this._bufs.length; i++)
			copy.append(this._bufs[i])
	
		return copy
	}
	
	
	BufferList.prototype.destroy = function destroy () {
		this._bufs.length = 0
		this.length = 0
		this.push(null)
	}
	
	
	;(function () {
		var methods = {
				'readDoubleBE' : 8
			, 'readDoubleLE' : 8
			, 'readFloatBE'  : 4
			, 'readFloatLE'  : 4
			, 'readInt32BE'  : 4
			, 'readInt32LE'  : 4
			, 'readUInt32BE' : 4
			, 'readUInt32LE' : 4
			, 'readInt16BE'  : 2
			, 'readInt16LE'  : 2
			, 'readUInt16BE' : 2
			, 'readUInt16LE' : 2
			, 'readInt8'     : 1
			, 'readUInt8'    : 1
		}
	
		for (var m in methods) {
			(function (m) {
				BufferList.prototype[m] = function (offset) {
					return this.slice(offset, offset + methods[m])[m](0)
				}
			}(m))
		}
	}())
	
	
	module.exports = BufferList
	
	},{"readable-stream/duplex":97,"safe-buffer":110,"util":117}],86:[function(require,module,exports){
	'use strict'
	
	var Buffer = require('safe-buffer').Buffer
	var max = 65536
	var cache = {}
	
	function generateBuffer (i) {
		var buffer = Buffer.allocUnsafe(2)
		buffer.writeUInt8(i >> 8, 0)
		buffer.writeUInt8(i & 0x00FF, 0 + 1)
	
		return buffer
	}
	
	function generateCache () {
		for (var i = 0; i < max; i++) {
			cache[i] = generateBuffer(i)
		}
	}
	
	/**
	 * calcVariableByteIntLength - calculate the variable byte integer
	 * length field
	 *
	 * @api private
	 */
	function calcVariableByteIntLength (length) {
		if (length >= 0 && length < 128) return 1
		else if (length >= 128 && length < 16384) return 2
		else if (length >= 16384 && length < 2097152) return 3
		else if (length >= 2097152 && length < 268435456) return 4
		else return 0
	}
	
	function genBufVariableByteInt (num) {
		var digit = 0
		var pos = 0
		var length = calcVariableByteIntLength(num)
		var buffer = Buffer.allocUnsafe(length)
	
		do {
			digit = num % 128 | 0
			num = num / 128 | 0
			if (num > 0) digit = digit | 0x80
	
			buffer.writeUInt8(digit, pos++)
		} while (num > 0)
	
		return {
			data: buffer,
			length: length
		}
	}
	
	function generate4ByteBuffer (num) {
		var buffer = Buffer.allocUnsafe(4)
		buffer.writeUInt32BE(num, 0)
		return buffer
	}
	
	module.exports = {
		cache: cache,
		generateCache: generateCache,
		generateNumber: generateBuffer,
		genBufVariableByteInt: genBufVariableByteInt,
		generate4ByteBuffer: generate4ByteBuffer
	}
	
	},{"safe-buffer":110}],87:[function(require,module,exports){
	
	function Packet () {
		this.cmd = null
		this.retain = false
		this.qos = 0
		this.dup = false
		this.length = -1
		this.topic = null
		this.payload = null
	}
	
	module.exports = Packet
	
	},{}],88:[function(require,module,exports){
	'use strict'
	
	var bl = require('bl')
	var inherits = require('inherits')
	var EE = require('events').EventEmitter
	var Packet = require('./packet')
	var constants = require('./constants')
	
	function Parser (opt) {
		if (!(this instanceof Parser)) return new Parser(opt)
	
		this.settings = opt || {}
	
		this._states = [
			'_parseHeader',
			'_parseLength',
			'_parsePayload',
			'_newPacket'
		]
	
		this._resetState()
	}
	
	inherits(Parser, EE)
	
	Parser.prototype._resetState = function () {
		this.packet = new Packet()
		this.error = null
		this._list = bl()
		this._stateCounter = 0
	}
	
	Parser.prototype.parse = function (buf) {
		if (this.error) this._resetState()
	
		this._list.append(buf)
	
		while ((this.packet.length !== -1 || this._list.length > 0) &&
		this[this._states[this._stateCounter]]() &&
		!this.error) {
			this._stateCounter++
	
			if (this._stateCounter >= this._states.length) this._stateCounter = 0
		}
	
		return this._list.length
	}
	
	Parser.prototype._parseHeader = function () {
		// There is at least one byte in the buffer
		var zero = this._list.readUInt8(0)
		this.packet.cmd = constants.types[zero >> constants.CMD_SHIFT]
		this.packet.retain = (zero & constants.RETAIN_MASK) !== 0
		this.packet.qos = (zero >> constants.QOS_SHIFT) & constants.QOS_MASK
		this.packet.dup = (zero & constants.DUP_MASK) !== 0
	
		this._list.consume(1)
	
		return true
	}
	
	Parser.prototype._parseLength = function () {
		// There is at least one byte in the list
		var result = this._parseVarByteNum(true)
	
		if (result) {
			this.packet.length = result.value
			this._list.consume(result.bytes)
		}
	
		return !!result
	}
	
	Parser.prototype._parsePayload = function () {
		var result = false
	
		// Do we have a payload? Do we have enough data to complete the payload?
		// PINGs have no payload
		if (this.packet.length === 0 || this._list.length >= this.packet.length) {
			this._pos = 0
	
			switch (this.packet.cmd) {
				case 'connect':
					this._parseConnect()
					break
				case 'connack':
					this._parseConnack()
					break
				case 'publish':
					this._parsePublish()
					break
				case 'puback':
				case 'pubrec':
				case 'pubrel':
				case 'pubcomp':
					this._parseConfirmation()
					break
				case 'subscribe':
					this._parseSubscribe()
					break
				case 'suback':
					this._parseSuback()
					break
				case 'unsubscribe':
					this._parseUnsubscribe()
					break
				case 'unsuback':
					this._parseUnsuback()
					break
				case 'pingreq':
				case 'pingresp':
					// These are empty, nothing to do
					break
				case 'disconnect':
					this._parseDisconnect()
					break
				case 'auth':
					this._parseAuth()
					break
				default:
					this._emitError(new Error('Not supported'))
			}
	
			result = true
		}
	
		return result
	}
	
	Parser.prototype._parseConnect = function () {
		var protocolId // Protocol ID
		var clientId // Client ID
		var topic // Will topic
		var payload // Will payload
		var password // Password
		var username // Username
		var flags = {}
		var packet = this.packet
	
		// Parse protocolId
		protocolId = this._parseString()
	
		if (protocolId === null) return this._emitError(new Error('Cannot parse protocolId'))
		if (protocolId !== 'MQTT' && protocolId !== 'MQIsdp') {
			return this._emitError(new Error('Invalid protocolId'))
		}
	
		packet.protocolId = protocolId
	
		// Parse constants version number
		if (this._pos >= this._list.length) return this._emitError(new Error('Packet too short'))
	
		packet.protocolVersion = this._list.readUInt8(this._pos)
	
		if (packet.protocolVersion !== 3 && packet.protocolVersion !== 4 && packet.protocolVersion !== 5) {
			return this._emitError(new Error('Invalid protocol version'))
		}
	
		this._pos++
	
		if (this._pos >= this._list.length) {
			return this._emitError(new Error('Packet too short'))
		}
	
		// Parse connect flags
		flags.username = (this._list.readUInt8(this._pos) & constants.USERNAME_MASK)
		flags.password = (this._list.readUInt8(this._pos) & constants.PASSWORD_MASK)
		flags.will = (this._list.readUInt8(this._pos) & constants.WILL_FLAG_MASK)
	
		if (flags.will) {
			packet.will = {}
			packet.will.retain = (this._list.readUInt8(this._pos) & constants.WILL_RETAIN_MASK) !== 0
			packet.will.qos = (this._list.readUInt8(this._pos) &
														constants.WILL_QOS_MASK) >> constants.WILL_QOS_SHIFT
		}
	
		packet.clean = (this._list.readUInt8(this._pos) & constants.CLEAN_SESSION_MASK) !== 0
		this._pos++
	
		// Parse keepalive
		packet.keepalive = this._parseNum()
		if (packet.keepalive === -1) return this._emitError(new Error('Packet too short'))
	
		// parse properties
		if (packet.protocolVersion === 5) {
			var properties = this._parseProperties()
			if (Object.getOwnPropertyNames(properties).length) {
				packet.properties = properties
			}
		}
		// Parse clientId
		clientId = this._parseString()
		if (clientId === null) return this._emitError(new Error('Packet too short'))
		packet.clientId = clientId
	
		if (flags.will) {
			if (packet.protocolVersion === 5) {
				var willProperties = this._parseProperties()
				if (Object.getOwnPropertyNames(willProperties).length) {
					packet.will.properties = willProperties
				}
			}
			// Parse will topic
			topic = this._parseString()
			if (topic === null) return this._emitError(new Error('Cannot parse will topic'))
			packet.will.topic = topic
	
			// Parse will payload
			payload = this._parseBuffer()
			if (payload === null) return this._emitError(new Error('Cannot parse will payload'))
			packet.will.payload = payload
		}
	
		// Parse username
		if (flags.username) {
			username = this._parseString()
			if (username === null) return this._emitError(new Error('Cannot parse username'))
			packet.username = username
		}
	
		// Parse password
		if (flags.password) {
			password = this._parseBuffer()
			if (password === null) return this._emitError(new Error('Cannot parse password'))
			packet.password = password
		}
		// need for right parse auth packet and self set up
		this.settings = packet
	
		return packet
	}
	
	Parser.prototype._parseConnack = function () {
		var packet = this.packet
	
		if (this._list.length < 2) return null
	
		packet.sessionPresent = !!(this._list.readUInt8(this._pos++) & constants.SESSIONPRESENT_MASK)
		if (this.settings.protocolVersion === 5) {
			packet.reasonCode = this._list.readUInt8(this._pos++)
		} else {
			packet.returnCode = this._list.readUInt8(this._pos++)
		}
	
		if (packet.returnCode === -1 || packet.reasonCode === -1) return this._emitError(new Error('Cannot parse return code'))
		// mqtt 5 properties
		if (this.settings.protocolVersion === 5) {
			var properties = this._parseProperties()
			if (Object.getOwnPropertyNames(properties).length) {
				packet.properties = properties
			}
		}
	}
	
	Parser.prototype._parsePublish = function () {
		var packet = this.packet
		packet.topic = this._parseString()
	
		if (packet.topic === null) return this._emitError(new Error('Cannot parse topic'))
	
		// Parse messageId
		if (packet.qos > 0) if (!this._parseMessageId()) { return }
	
		// Properties mqtt 5
		if (this.settings.protocolVersion === 5) {
			var properties = this._parseProperties()
			if (Object.getOwnPropertyNames(properties).length) {
				packet.properties = properties
			}
		}
	
		packet.payload = this._list.slice(this._pos, packet.length)
	}
	
	Parser.prototype._parseSubscribe = function () {
		var packet = this.packet
		var topic
		var options
		var qos
		var rh
		var rap
		var nl
		var subscription
	
		if (packet.qos !== 1) {
			return this._emitError(new Error('Wrong subscribe header'))
		}
	
		packet.subscriptions = []
	
		if (!this._parseMessageId()) { return }
	
		// Properties mqtt 5
		if (this.settings.protocolVersion === 5) {
			var properties = this._parseProperties()
			if (Object.getOwnPropertyNames(properties).length) {
				packet.properties = properties
			}
		}
	
		while (this._pos < packet.length) {
			// Parse topic
			topic = this._parseString()
			if (topic === null) return this._emitError(new Error('Cannot parse topic'))
	
			options = this._parseByte()
			qos = options & constants.SUBSCRIBE_OPTIONS_QOS_MASK
			nl = ((options >> constants.SUBSCRIBE_OPTIONS_NL_SHIFT) & constants.SUBSCRIBE_OPTIONS_NL_MASK) !== 0
			rap = ((options >> constants.SUBSCRIBE_OPTIONS_RAP_SHIFT) & constants.SUBSCRIBE_OPTIONS_RAP_MASK) !== 0
			rh = (options >> constants.SUBSCRIBE_OPTIONS_RH_SHIFT) & constants.SUBSCRIBE_OPTIONS_RH_MASK
	
			subscription = { topic: topic, qos: qos }
	
			// mqtt 5 options
			if (this.settings.protocolVersion === 5) {
				subscription.nl = nl
				subscription.rap = rap
				subscription.rh = rh
			}
	
			// Push pair to subscriptions
			packet.subscriptions.push(subscription)
		}
	}
	
	Parser.prototype._parseSuback = function () {
		var packet = this.packet
		this.packet.granted = []
	
		if (!this._parseMessageId()) { return }
	
		// Properties mqtt 5
		if (this.settings.protocolVersion === 5) {
			var properties = this._parseProperties()
			if (Object.getOwnPropertyNames(properties).length) {
				packet.properties = properties
			}
		}
	
		// Parse granted QoSes
		while (this._pos < this.packet.length) {
			this.packet.granted.push(this._list.readUInt8(this._pos++))
		}
	}
	
	Parser.prototype._parseUnsubscribe = function () {
		var packet = this.packet
	
		packet.unsubscriptions = []
	
		// Parse messageId
		if (!this._parseMessageId()) { return }
	
		// Properties mqtt 5
		if (this.settings.protocolVersion === 5) {
			var properties = this._parseProperties()
			if (Object.getOwnPropertyNames(properties).length) {
				packet.properties = properties
			}
		}
	
		while (this._pos < packet.length) {
			var topic
	
			// Parse topic
			topic = this._parseString()
			if (topic === null) return this._emitError(new Error('Cannot parse topic'))
	
			// Push topic to unsubscriptions
			packet.unsubscriptions.push(topic)
		}
	}
	
	Parser.prototype._parseUnsuback = function () {
		var packet = this.packet
		if (!this._parseMessageId()) return this._emitError(new Error('Cannot parse messageId'))
		// Properties mqtt 5
		if (this.settings.protocolVersion === 5) {
			var properties = this._parseProperties()
			if (Object.getOwnPropertyNames(properties).length) {
				packet.properties = properties
			}
			// Parse granted QoSes
			packet.granted = []
			while (this._pos < this.packet.length) {
				this.packet.granted.push(this._list.readUInt8(this._pos++))
			}
		}
	}
	
	// parse packets like puback, pubrec, pubrel, pubcomp
	Parser.prototype._parseConfirmation = function () {
		var packet = this.packet
	
		this._parseMessageId()
	
		if (this.settings.protocolVersion === 5) {
			if (packet.length > 2) {
				// response code
				packet.reasonCode = this._parseByte()
				// properies mqtt 5
				var properties = this._parseProperties()
				if (Object.getOwnPropertyNames(properties).length) {
					packet.properties = properties
				}
			}
		}
	
		return true
	}
	
	// parse disconnect packet
	Parser.prototype._parseDisconnect = function () {
		var packet = this.packet
	
		if (this.settings.protocolVersion === 5) {
			// response code
			packet.reasonCode = this._parseByte()
			// properies mqtt 5
			var properties = this._parseProperties()
			if (Object.getOwnPropertyNames(properties).length) {
				packet.properties = properties
			}
		}
	
		return true
	}
	
	// parse auth packet
	Parser.prototype._parseAuth = function () {
		var packet = this.packet
	
		if (this.settings.protocolVersion !== 5) {
			return this._emitError(new Error('Not supported auth packet for this version MQTT'))
		}
	
		// response code
		packet.reasonCode = this._parseByte()
		// properies mqtt 5
		var properties = this._parseProperties()
		if (Object.getOwnPropertyNames(properties).length) {
			packet.properties = properties
		}
	
		return true
	}
	
	Parser.prototype._parseMessageId = function () {
		var packet = this.packet
	
		packet.messageId = this._parseNum()
	
		if (packet.messageId === null) {
			this._emitError(new Error('Cannot parse messageId'))
			return false
		}
	
		return true
	}
	
	Parser.prototype._parseString = function (maybeBuffer) {
		var length = this._parseNum()
		var result
		var end = length + this._pos
	
		if (length === -1 || end > this._list.length || end > this.packet.length) return null
	
		result = this._list.toString('utf8', this._pos, end)
		this._pos += length
	
		return result
	}
	
	Parser.prototype._parseStringPair = function () {
		return {
			name: this._parseString(),
			value: this._parseString()
		}
	}
	
	Parser.prototype._parseBuffer = function () {
		var length = this._parseNum()
		var result
		var end = length + this._pos
	
		if (length === -1 || end > this._list.length || end > this.packet.length) return null
	
		result = this._list.slice(this._pos, end)
	
		this._pos += length
	
		return result
	}
	
	Parser.prototype._parseNum = function () {
		if (this._list.length - this._pos < 2) return -1
	
		var result = this._list.readUInt16BE(this._pos)
		this._pos += 2
	
		return result
	}
	
	Parser.prototype._parse4ByteNum = function () {
		if (this._list.length - this._pos < 4) return -1
	
		var result = this._list.readUInt32BE(this._pos)
		this._pos += 4
	
		return result
	}
	
	Parser.prototype._parseVarByteNum = function (fullInfoFlag) {
		var bytes = 0
		var mul = 1
		var length = 0
		var result = true
		var current
		var padding = this._pos ? this._pos : 0
	
		while (bytes < 5) {
			current = this._list.readUInt8(padding + bytes++)
			length += mul * (current & constants.LENGTH_MASK)
			mul *= 0x80
	
			if ((current & constants.LENGTH_FIN_MASK) === 0) break
			if (this._list.length <= bytes) {
				result = false
				break
			}
		}
	
		if (padding) {
			this._pos += bytes
		}
	
		result = result
			? fullInfoFlag ? {
				bytes: bytes,
				value: length
			} : length
			: false
	
		return result
	}
	
	Parser.prototype._parseByte = function () {
		var result = this._list.readUInt8(this._pos)
		this._pos++
		return result
	}
	
	Parser.prototype._parseByType = function (type) {
		switch (type) {
			case 'byte': {
				return this._parseByte() !== 0
			}
			case 'int8': {
				return this._parseByte()
			}
			case 'int16': {
				return this._parseNum()
			}
			case 'int32': {
				return this._parse4ByteNum()
			}
			case 'var': {
				return this._parseVarByteNum()
			}
			case 'string': {
				return this._parseString()
			}
			case 'pair': {
				return this._parseStringPair()
			}
			case 'binary': {
				return this._parseBuffer()
			}
		}
	}
	
	Parser.prototype._parseProperties = function () {
		var length = this._parseVarByteNum()
		var start = this._pos
		var end = start + length
		var result = {}
		while (this._pos < end) {
			var type = this._parseByte()
			var name = constants.propertiesCodes[type]
			if (!name) {
				this._emitError(new Error('Unknown property'))
				return false
			}
			// user properties process
			if (name === 'userProperties') {
				if (!result[name]) {
					result[name] = {}
				}
				var currentUserProperty = this._parseByType(constants.propertiesTypes[name])
				result[name][currentUserProperty.name] = currentUserProperty.value
				continue
			}
			result[name] = this._parseByType(constants.propertiesTypes[name])
		}
		return result
	}
	
	Parser.prototype._newPacket = function () {
		if (this.packet) {
			this._list.consume(this.packet.length)
			this.emit('packet', this.packet)
		}
	
		this.packet = new Packet()
	
		this._pos = 0
	
		return true
	}
	
	Parser.prototype._emitError = function (err) {
		this.error = err
		this.emit('error', err)
	}
	
	module.exports = Parser
	
	},{"./constants":82,"./packet":87,"bl":85,"events":13,"inherits":80}],89:[function(require,module,exports){
	'use strict'
	
	var protocol = require('./constants')
	var Buffer = require('safe-buffer').Buffer
	var empty = Buffer.allocUnsafe(0)
	var zeroBuf = Buffer.from([0])
	var numbers = require('./numbers')
	var nextTick = require('process-nextick-args').nextTick
	
	var numCache = numbers.cache
	var generateNumber = numbers.generateNumber
	var generateCache = numbers.generateCache
	var genBufVariableByteInt = numbers.genBufVariableByteInt
	var generate4ByteBuffer = numbers.generate4ByteBuffer
	var writeNumber = writeNumberCached
	var toGenerate = true
	
	function generate (packet, stream, opts) {
		if (stream.cork) {
			stream.cork()
			nextTick(uncork, stream)
		}
	
		if (toGenerate) {
			toGenerate = false
			generateCache()
		}
	
		switch (packet.cmd) {
			case 'connect':
				return connect(packet, stream, opts)
			case 'connack':
				return connack(packet, stream, opts)
			case 'publish':
				return publish(packet, stream, opts)
			case 'puback':
			case 'pubrec':
			case 'pubrel':
			case 'pubcomp':
				return confirmation(packet, stream, opts)
			case 'subscribe':
				return subscribe(packet, stream, opts)
			case 'suback':
				return suback(packet, stream, opts)
			case 'unsubscribe':
				return unsubscribe(packet, stream, opts)
			case 'unsuback':
				return unsuback(packet, stream, opts)
			case 'pingreq':
			case 'pingresp':
				return emptyPacket(packet, stream, opts)
			case 'disconnect':
				return disconnect(packet, stream, opts)
			case 'auth':
				return auth(packet, stream, opts)
			default:
				stream.emit('error', new Error('Unknown command'))
				return false
		}
	}
	/**
	 * Controls numbers cache.
	 * Set to "false" to allocate buffers on-the-flight instead of pre-generated cache
	 */
	Object.defineProperty(generate, 'cacheNumbers', {
		get: function () {
			return writeNumber === writeNumberCached
		},
		set: function (value) {
			if (value) {
				if (!numCache || Object.keys(numCache).length === 0) toGenerate = true
				writeNumber = writeNumberCached
			} else {
				toGenerate = false
				writeNumber = writeNumberGenerated
			}
		}
	})
	
	function uncork (stream) {
		stream.uncork()
	}
	
	function connect (packet, stream, opts) {
		var settings = packet || {}
		var protocolId = settings.protocolId || 'MQTT'
		var protocolVersion = settings.protocolVersion || 4
		var will = settings.will
		var clean = settings.clean
		var keepalive = settings.keepalive || 0
		var clientId = settings.clientId || ''
		var username = settings.username
		var password = settings.password
		/* mqtt5 new oprions */
		var properties = settings.properties
	
		if (clean === undefined) clean = true
	
		var length = 0
	
		// Must be a string and non-falsy
		if (!protocolId ||
			 (typeof protocolId !== 'string' && !Buffer.isBuffer(protocolId))) {
			stream.emit('error', new Error('Invalid protocolId'))
			return false
		} else length += protocolId.length + 2
	
		// Must be 3 or 4 or 5
		if (protocolVersion !== 3 && protocolVersion !== 4 && protocolVersion !== 5) {
			stream.emit('error', new Error('Invalid protocol version'))
			return false
		} else length += 1
	
		// ClientId might be omitted in 3.1.1, but only if cleanSession is set to 1
		if ((typeof clientId === 'string' || Buffer.isBuffer(clientId)) &&
			 (clientId || protocolVersion === 4) && (clientId || clean)) {
			length += clientId.length + 2
		} else {
			if (protocolVersion < 4) {
				stream.emit('error', new Error('clientId must be supplied before 3.1.1'))
				return false
			}
			if ((clean * 1) === 0) {
				stream.emit('error', new Error('clientId must be given if cleanSession set to 0'))
				return false
			}
		}
	
		// Must be a two byte number
		if (typeof keepalive !== 'number' ||
				keepalive < 0 ||
				keepalive > 65535 ||
				keepalive % 1 !== 0) {
			stream.emit('error', new Error('Invalid keepalive'))
			return false
		} else length += 2
	
		// Connect flags
		length += 1
	
		// Properties
		if (protocolVersion === 5) {
			var propertiesData = getProperties(stream, properties)
			length += propertiesData.length
		}
	
		// If will exists...
		if (will) {
			// It must be an object
			if (typeof will !== 'object') {
				stream.emit('error', new Error('Invalid will'))
				return false
			}
			// It must have topic typeof string
			if (!will.topic || typeof will.topic !== 'string') {
				stream.emit('error', new Error('Invalid will topic'))
				return false
			} else {
				length += Buffer.byteLength(will.topic) + 2
			}
	
			// Payload
			if (will.payload) {
				if (will.payload.length >= 0) {
					if (typeof will.payload === 'string') {
						length += Buffer.byteLength(will.payload) + 2
					} else {
						length += will.payload.length + 2
					}
				} else {
					stream.emit('error', new Error('Invalid will payload'))
					return false
				}
	
				// will properties
				var willProperties = {}
				if (protocolVersion === 5) {
					willProperties = getProperties(stream, will.properties)
					length += willProperties.length
				}
			}
		}
	
		// Username
		var providedUsername = false
		if (username != null) {
			if (isStringOrBuffer(username)) {
				providedUsername = true
				length += Buffer.byteLength(username) + 2
			} else {
				stream.emit('error', new Error('Invalid username'))
				return false
			}
		}
	
		// Password
		if (password != null) {
			if (!providedUsername) {
				stream.emit('error', new Error('Username is required to use password'))
				return false
			}
	
			if (isStringOrBuffer(password)) {
				length += byteLength(password) + 2
			} else {
				stream.emit('error', new Error('Invalid password'))
				return false
			}
		}
	
		// Generate header
		stream.write(protocol.CONNECT_HEADER)
	
		// Generate length
		writeVarByteInt(stream, length)
	
		// Generate protocol ID
		writeStringOrBuffer(stream, protocolId)
		stream.write(
			protocolVersion === 4
				? protocol.VERSION4
				: protocolVersion === 5
					? protocol.VERSION5
					: protocol.VERSION3
		)
	
		// Connect flags
		var flags = 0
		flags |= (username != null) ? protocol.USERNAME_MASK : 0
		flags |= (password != null) ? protocol.PASSWORD_MASK : 0
		flags |= (will && will.retain) ? protocol.WILL_RETAIN_MASK : 0
		flags |= (will && will.qos) ? will.qos << protocol.WILL_QOS_SHIFT : 0
		flags |= will ? protocol.WILL_FLAG_MASK : 0
		flags |= clean ? protocol.CLEAN_SESSION_MASK : 0
	
		stream.write(Buffer.from([flags]))
	
		// Keepalive
		writeNumber(stream, keepalive)
	
		// Properties
		if (protocolVersion === 5) {
			propertiesData.write()
		}
	
		// Client ID
		writeStringOrBuffer(stream, clientId)
	
		// Will
		if (will) {
			if (protocolVersion === 5) {
				willProperties.write()
			}
			writeString(stream, will.topic)
			writeStringOrBuffer(stream, will.payload)
		}
	
		// Username and password
		if (username != null) {
			writeStringOrBuffer(stream, username)
		}
		if (password != null) {
			writeStringOrBuffer(stream, password)
		}
		// This is a small packet that happens only once on a stream
		// We assume the stream is always free to receive more data after this
		return true
	}
	
	function connack (packet, stream, opts) {
		var version = opts ? opts.protocolVersion : 4
		var settings = packet || {}
		var rc = version === 5 ? settings.reasonCode : settings.returnCode
		var properties = settings.properties
		var length = 2 // length of rc and sessionHeader
	
		// Check return code
		if (typeof rc !== 'number') {
			stream.emit('error', new Error('Invalid return code'))
			return false
		}
		// mqtt5 properties
		var propertiesData = null
		if (version === 5) {
			propertiesData = getProperties(stream, properties)
			length += propertiesData.length
		}
	
		stream.write(protocol.CONNACK_HEADER)
		// length
		writeVarByteInt(stream, length)
		stream.write(settings.sessionPresent ? protocol.SESSIONPRESENT_HEADER : zeroBuf)
	
		stream.write(Buffer.from([rc]))
		if (propertiesData != null) {
			propertiesData.write()
		}
		return true
	}
	
	function publish (packet, stream, opts) {
		var version = opts ? opts.protocolVersion : 4
		var settings = packet || {}
		var qos = settings.qos || 0
		var retain = settings.retain ? protocol.RETAIN_MASK : 0
		var topic = settings.topic
		var payload = settings.payload || empty
		var id = settings.messageId
		var properties = settings.properties
	
		var length = 0
	
		// Topic must be a non-empty string or Buffer
		if (typeof topic === 'string') length += Buffer.byteLength(topic) + 2
		else if (Buffer.isBuffer(topic)) length += topic.length + 2
		else {
			stream.emit('error', new Error('Invalid topic'))
			return false
		}
	
		// Get the payload length
		if (!Buffer.isBuffer(payload)) length += Buffer.byteLength(payload)
		else length += payload.length
	
		// Message ID must a number if qos > 0
		if (qos && typeof id !== 'number') {
			stream.emit('error', new Error('Invalid messageId'))
			return false
		} else if (qos) length += 2
	
		// mqtt5 properties
		var propertiesData = null
		if (version === 5) {
			propertiesData = getProperties(stream, properties)
			length += propertiesData.length
		}
	
		// Header
		stream.write(protocol.PUBLISH_HEADER[qos][settings.dup ? 1 : 0][retain ? 1 : 0])
	
		// Remaining length
		writeVarByteInt(stream, length)
	
		// Topic
		writeNumber(stream, byteLength(topic))
		stream.write(topic)
	
		// Message ID
		if (qos > 0) writeNumber(stream, id)
	
		// Properties
		if (propertiesData != null) {
			propertiesData.write()
		}
	
		// Payload
		return stream.write(payload)
	}
	
	/* Puback, pubrec, pubrel and pubcomp */
	function confirmation (packet, stream, opts) {
		var version = opts ? opts.protocolVersion : 4
		var settings = packet || {}
		var type = settings.cmd || 'puback'
		var id = settings.messageId
		var dup = (settings.dup && type === 'pubrel') ? protocol.DUP_MASK : 0
		var qos = 0
		var reasonCode = settings.reasonCode
		var properties = settings.properties
		var length = version === 5 ? 3 : 2
	
		if (type === 'pubrel') qos = 1
	
		// Check message ID
		if (typeof id !== 'number') {
			stream.emit('error', new Error('Invalid messageId'))
			return false
		}
	
		// properies mqtt 5
		var propertiesData = null
		if (version === 5) {
			propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
			if (!propertiesData) { return false }
			length += propertiesData.length
		}
	
		// Header
		stream.write(protocol.ACKS[type][qos][dup][0])
	
		// Length
		writeVarByteInt(stream, length)
	
		// Message ID
		writeNumber(stream, id)
	
		// reason code in header
		if (version === 5) {
			stream.write(Buffer.from([reasonCode]))
		}
	
		// properies mqtt 5
		if (propertiesData !== null) {
			propertiesData.write()
		}
		return true
	}
	
	function subscribe (packet, stream, opts) {
		var version = opts ? opts.protocolVersion : 4
		var settings = packet || {}
		var dup = settings.dup ? protocol.DUP_MASK : 0
		var id = settings.messageId
		var subs = settings.subscriptions
		var properties = settings.properties
	
		var length = 0
	
		// Check message ID
		if (typeof id !== 'number') {
			stream.emit('error', new Error('Invalid messageId'))
			return false
		} else length += 2
	
		// properies mqtt 5
		var propertiesData = null
		if (version === 5) {
			propertiesData = getProperties(stream, properties)
			length += propertiesData.length
		}
	
		// Check subscriptions
		if (typeof subs === 'object' && subs.length) {
			for (var i = 0; i < subs.length; i += 1) {
				var itopic = subs[i].topic
				var iqos = subs[i].qos
	
				if (typeof itopic !== 'string') {
					stream.emit('error', new Error('Invalid subscriptions - invalid topic'))
					return false
				}
				if (typeof iqos !== 'number') {
					stream.emit('error', new Error('Invalid subscriptions - invalid qos'))
					return false
				}
	
				if (version === 5) {
					var nl = subs[i].nl || false
					if (typeof nl !== 'boolean') {
						stream.emit('error', new Error('Invalid subscriptions - invalid No Local'))
						return false
					}
					var rap = subs[i].rap || false
					if (typeof rap !== 'boolean') {
						stream.emit('error', new Error('Invalid subscriptions - invalid Retain as Published'))
						return false
					}
					var rh = subs[i].rh || 0
					if (typeof rh !== 'number' || rh > 2) {
						stream.emit('error', new Error('Invalid subscriptions - invalid Retain Handling'))
						return false
					}
				}
	
				length += Buffer.byteLength(itopic) + 2 + 1
			}
		} else {
			stream.emit('error', new Error('Invalid subscriptions'))
			return false
		}
	
		// Generate header
		stream.write(protocol.SUBSCRIBE_HEADER[1][dup ? 1 : 0][0])
	
		// Generate length
		writeVarByteInt(stream, length)
	
		// Generate message ID
		writeNumber(stream, id)
	
		// properies mqtt 5
		if (propertiesData !== null) {
			propertiesData.write()
		}
	
		var result = true
	
		// Generate subs
		for (var j = 0; j < subs.length; j++) {
			var sub = subs[j]
			var jtopic = sub.topic
			var jqos = sub.qos
			var jnl = +sub.nl
			var jrap = +sub.rap
			var jrh = sub.rh
			var joptions
	
			// Write topic string
			writeString(stream, jtopic)
	
			// options process
			joptions = protocol.SUBSCRIBE_OPTIONS_QOS[jqos]
			if (version === 5) {
				joptions |= jnl ? protocol.SUBSCRIBE_OPTIONS_NL : 0
				joptions |= jrap ? protocol.SUBSCRIBE_OPTIONS_RAP : 0
				joptions |= jrh ? protocol.SUBSCRIBE_OPTIONS_RH[jrh] : 0
			}
			// Write options
			result = stream.write(Buffer.from([joptions]))
		}
	
		return result
	}
	
	function suback (packet, stream, opts) {
		var version = opts ? opts.protocolVersion : 4
		var settings = packet || {}
		var id = settings.messageId
		var granted = settings.granted
		var properties = settings.properties
		var length = 0
	
		// Check message ID
		if (typeof id !== 'number') {
			stream.emit('error', new Error('Invalid messageId'))
			return false
		} else length += 2
	
		// Check granted qos vector
		if (typeof granted === 'object' && granted.length) {
			for (var i = 0; i < granted.length; i += 1) {
				if (typeof granted[i] !== 'number') {
					stream.emit('error', new Error('Invalid qos vector'))
					return false
				}
				length += 1
			}
		} else {
			stream.emit('error', new Error('Invalid qos vector'))
			return false
		}
	
		// properies mqtt 5
		var propertiesData = null
		if (version === 5) {
			propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
			if (!propertiesData) { return false }
			length += propertiesData.length
		}
	
		// header
		stream.write(protocol.SUBACK_HEADER)
	
		// Length
		writeVarByteInt(stream, length)
	
		// Message ID
		writeNumber(stream, id)
	
		// properies mqtt 5
		if (propertiesData !== null) {
			propertiesData.write()
		}
	
		return stream.write(Buffer.from(granted))
	}
	
	function unsubscribe (packet, stream, opts) {
		var version = opts ? opts.protocolVersion : 4
		var settings = packet || {}
		var id = settings.messageId
		var dup = settings.dup ? protocol.DUP_MASK : 0
		var unsubs = settings.unsubscriptions
		var properties = settings.properties
	
		var length = 0
	
		// Check message ID
		if (typeof id !== 'number') {
			stream.emit('error', new Error('Invalid messageId'))
			return false
		} else {
			length += 2
		}
		// Check unsubs
		if (typeof unsubs === 'object' && unsubs.length) {
			for (var i = 0; i < unsubs.length; i += 1) {
				if (typeof unsubs[i] !== 'string') {
					stream.emit('error', new Error('Invalid unsubscriptions'))
					return false
				}
				length += Buffer.byteLength(unsubs[i]) + 2
			}
		} else {
			stream.emit('error', new Error('Invalid unsubscriptions'))
			return false
		}
		// properies mqtt 5
		var propertiesData = null
		if (version === 5) {
			propertiesData = getProperties(stream, properties)
			length += propertiesData.length
		}
	
		// Header
		stream.write(protocol.UNSUBSCRIBE_HEADER[1][dup ? 1 : 0][0])
	
		// Length
		writeVarByteInt(stream, length)
	
		// Message ID
		writeNumber(stream, id)
	
		// properies mqtt 5
		if (propertiesData !== null) {
			propertiesData.write()
		}
	
		// Unsubs
		var result = true
		for (var j = 0; j < unsubs.length; j++) {
			result = writeString(stream, unsubs[j])
		}
	
		return result
	}
	
	function unsuback (packet, stream, opts) {
		var version = opts ? opts.protocolVersion : 4
		var settings = packet || {}
		var id = settings.messageId
		var dup = settings.dup ? protocol.DUP_MASK : 0
		var granted = settings.granted
		var properties = settings.properties
		var type = settings.cmd
		var qos = 0
	
		var length = 2
	
		// Check message ID
		if (typeof id !== 'number') {
			stream.emit('error', new Error('Invalid messageId'))
			return false
		}
	
		// Check granted
		if (version === 5) {
			if (typeof granted === 'object' && granted.length) {
				for (var i = 0; i < granted.length; i += 1) {
					if (typeof granted[i] !== 'number') {
						stream.emit('error', new Error('Invalid qos vector'))
						return false
					}
					length += 1
				}
			} else {
				stream.emit('error', new Error('Invalid qos vector'))
				return false
			}
		}
	
		// properies mqtt 5
		var propertiesData = null
		if (version === 5) {
			propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
			if (!propertiesData) { return false }
			length += propertiesData.length
		}
	
		// Header
		stream.write(protocol.ACKS[type][qos][dup][0])
	
		// Length
		writeVarByteInt(stream, length)
	
		// Message ID
		writeNumber(stream, id)
	
		// properies mqtt 5
		if (propertiesData !== null) {
			propertiesData.write()
		}
	
		// payload
		if (version === 5) {
			stream.write(Buffer.from(granted))
		}
		return true
	}
	
	function emptyPacket (packet, stream, opts) {
		return stream.write(protocol.EMPTY[packet.cmd])
	}
	
	function disconnect (packet, stream, opts) {
		var version = opts ? opts.protocolVersion : 4
		var settings = packet || {}
		var reasonCode = settings.reasonCode
		var properties = settings.properties
		var length = version === 5 ? 1 : 0
	
		// properies mqtt 5
		var propertiesData = null
		if (version === 5) {
			propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
			if (!propertiesData) { return false }
			length += propertiesData.length
		}
	
		// Header
		stream.write(Buffer.from([protocol.codes['disconnect'] << 4]))
	
		// Length
		writeVarByteInt(stream, length)
	
		// reason code in header
		if (version === 5) {
			stream.write(Buffer.from([reasonCode]))
		}
	
		// properies mqtt 5
		if (propertiesData !== null) {
			propertiesData.write()
		}
	
		return true
	}
	
	function auth (packet, stream, opts) {
		var version = opts ? opts.protocolVersion : 4
		var settings = packet || {}
		var reasonCode = settings.reasonCode
		var properties = settings.properties
		var length = version === 5 ? 1 : 0
	
		if (version !== 5) stream.emit('error', new Error('Invalid mqtt version for auth packet'))
	
		// properies mqtt 5
		var propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
		if (!propertiesData) { return false }
		length += propertiesData.length
	
		// Header
		stream.write(Buffer.from([protocol.codes['auth'] << 4]))
	
		// Length
		writeVarByteInt(stream, length)
	
		// reason code in header
		stream.write(Buffer.from([reasonCode]))
	
		// properies mqtt 5
		if (propertiesData !== null) {
			propertiesData.write()
		}
		return true
	}
	
	/**
	 * writeVarByteInt - write an MQTT style variable byte integer to the buffer
	 *
	 * @param <Buffer> buffer - destination
	 * @param <Number> pos - offset
	 * @param <Number> length - length (>0)
	 * @returns <Number> number of bytes written
	 *
	 * @api private
	 */
	
	var varByteIntCache = {}
	function writeVarByteInt (stream, num) {
		var buffer = varByteIntCache[num]
	
		if (!buffer) {
			buffer = genBufVariableByteInt(num).data
			if (num < 16384) varByteIntCache[num] = buffer
		}
	
		stream.write(buffer)
	}
	
	/**
	 * writeString - write a utf8 string to the buffer
	 *
	 * @param <Buffer> buffer - destination
	 * @param <Number> pos - offset
	 * @param <String> string - string to write
	 * @return <Number> number of bytes written
	 *
	 * @api private
	 */
	
	function writeString (stream, string) {
		var strlen = Buffer.byteLength(string)
		writeNumber(stream, strlen)
	
		stream.write(string, 'utf8')
	}
	
	/**
	 * writeStringPair - write a utf8 string pairs to the buffer
	 *
	 * @param <Buffer> buffer - destination
	 * @param <String> name - string name to write
	 * @param <String> value - string value to write
	 * @return <Number> number of bytes written
	 *
	 * @api private
	 */
	function writeStringPair (stream, name, value) {
		writeString(stream, name)
		writeString(stream, value)
	}
	
	/**
	 * writeNumber - write a two byte number to the buffer
	 *
	 * @param <Buffer> buffer - destination
	 * @param <Number> pos - offset
	 * @param <String> number - number to write
	 * @return <Number> number of bytes written
	 *
	 * @api private
	 */
	function writeNumberCached (stream, number) {
		return stream.write(numCache[number])
	}
	function writeNumberGenerated (stream, number) {
		return stream.write(generateNumber(number))
	}
	function write4ByteNumber (stream, number) {
		return stream.write(generate4ByteBuffer(number))
	}
	/**
	 * writeStringOrBuffer - write a String or Buffer with the its length prefix
	 *
	 * @param <Buffer> buffer - destination
	 * @param <Number> pos - offset
	 * @param <String> toWrite - String or Buffer
	 * @return <Number> number of bytes written
	 */
	function writeStringOrBuffer (stream, toWrite) {
		if (typeof toWrite === 'string') {
			writeString(stream, toWrite)
		} else if (toWrite) {
			writeNumber(stream, toWrite.length)
			stream.write(toWrite)
		} else writeNumber(stream, 0)
	}
	
	function getProperties (stream, properties) {
		/* connect properties */
		if (typeof properties !== 'object' || properties.length != null) {
			return {
				length: 1,
				write: function () {
					writeProperties(stream, {}, 0)
				}
			}
		}
		var propertiesLength = 0
		function getLengthProperty (name) {
			var type = protocol.propertiesTypes[name]
			var value = properties[name]
			var length = 0
			switch (type) {
				case 'byte': {
					if (typeof value !== 'boolean') {
						stream.emit('error', new Error('Invalid ' + name))
						return false
					}
					length += 1 + 1
					break
				}
				case 'int8': {
					if (typeof value !== 'number') {
						stream.emit('error', new Error('Invalid ' + name))
						return false
					}
					length += 1 + 1
					break
				}
				case 'binary': {
					if (value && value === null) {
						stream.emit('error', new Error('Invalid ' + name))
						return false
					}
					length += 1 + Buffer.byteLength(value) + 2
					break
				}
				case 'int16': {
					if (typeof value !== 'number') {
						stream.emit('error', new Error('Invalid ' + name))
						return false
					}
					length += 1 + 2
					break
				}
				case 'int32': {
					if (typeof value !== 'number') {
						stream.emit('error', new Error('Invalid ' + name))
						return false
					}
					length += 1 + 4
					break
				}
				case 'var': {
					if (typeof value !== 'number') {
						stream.emit('error', new Error('Invalid ' + name))
						return false
					}
					length += 1 + genBufVariableByteInt(value).length
					break
				}
				case 'string': {
					if (typeof value !== 'string') {
						stream.emit('error', new Error('Invalid ' + name))
						return false
					}
					length += 1 + 2 + Buffer.byteLength(value.toString())
					break
				}
				case 'pair': {
					if (typeof value !== 'object') {
						stream.emit('error', new Error('Invalid ' + name))
						return false
					}
					length += Object.getOwnPropertyNames(value).reduce(function (result, name) {
						result += 1 + 2 + Buffer.byteLength(name.toString()) + 2 + Buffer.byteLength(value[name].toString())
						return result
					}, 0)
					break
				}
				default: {
					stream.emit('error', new Error('Invalid property ' + name))
					return false
				}
			}
			return length
		}
		if (properties) {
			for (var propName in properties) {
				var propLength = getLengthProperty(propName)
				if (!propLength) return false
				propertiesLength += propLength
			}
		}
		var propertiesLengthLength = genBufVariableByteInt(propertiesLength).length
	
		return {
			length: propertiesLengthLength + propertiesLength,
			write: function () {
				writeProperties(stream, properties, propertiesLength)
			}
		}
	}
	
	function getPropertiesByMaximumPacketSize (stream, properties, opts, length) {
		var mayEmptyProps = ['reasonString', 'userProperties']
		var maximumPacketSize = opts && opts.properties && opts.properties.maximumPacketSize ? opts.properties.maximumPacketSize : 0
	
		var propertiesData = getProperties(stream, properties)
		if (maximumPacketSize) {
			while (length + propertiesData.length > maximumPacketSize) {
				var currentMayEmptyProp = mayEmptyProps.shift()
				if (currentMayEmptyProp && properties[currentMayEmptyProp]) {
					delete properties[currentMayEmptyProp]
					propertiesData = getProperties(stream, properties)
				} else {
					return false
				}
			}
		}
		return propertiesData
	}
	
	function writeProperties (stream, properties, propertiesLength) {
		/* write properties to stream */
		writeVarByteInt(stream, propertiesLength)
		for (var propName in properties) {
			if (properties.hasOwnProperty(propName) && properties[propName] !== null) {
				var value = properties[propName]
				var type = protocol.propertiesTypes[propName]
				switch (type) {
					case 'byte': {
						stream.write(Buffer.from([protocol.properties[propName]]))
						stream.write(Buffer.from([+value]))
						break
					}
					case 'int8': {
						stream.write(Buffer.from([protocol.properties[propName]]))
						stream.write(Buffer.from([value]))
						break
					}
					case 'binary': {
						stream.write(Buffer.from([protocol.properties[propName]]))
						writeStringOrBuffer(stream, value)
						break
					}
					case 'int16': {
						stream.write(Buffer.from([protocol.properties[propName]]))
						writeNumber(stream, value)
						break
					}
					case 'int32': {
						stream.write(Buffer.from([protocol.properties[propName]]))
						write4ByteNumber(stream, value)
						break
					}
					case 'var': {
						stream.write(Buffer.from([protocol.properties[propName]]))
						writeVarByteInt(stream, value)
						break
					}
					case 'string': {
						stream.write(Buffer.from([protocol.properties[propName]]))
						writeString(stream, value)
						break
					}
					case 'pair': {
						Object.getOwnPropertyNames(value).forEach(function (name) {
							stream.write(Buffer.from([protocol.properties[propName]]))
							writeStringPair(stream, name.toString(), value[name].toString())
						})
						break
					}
					default: {
						stream.emit('error', new Error('Invalid property ' + propName))
						return false
					}
				}
			}
		}
	}
	
	function byteLength (bufOrString) {
		if (!bufOrString) return 0
		else if (bufOrString instanceof Buffer) return bufOrString.length
		else return Buffer.byteLength(bufOrString)
	}
	
	function isStringOrBuffer (field) {
		return typeof field === 'string' || field instanceof Buffer
	}
	
	module.exports = generate
	
	},{"./constants":82,"./numbers":86,"process-nextick-args":91,"safe-buffer":110}],90:[function(require,module,exports){
	var wrappy = require('wrappy')
	module.exports = wrappy(once)
	module.exports.strict = wrappy(onceStrict)
	
	once.proto = once(function () {
		Object.defineProperty(Function.prototype, 'once', {
			value: function () {
				return once(this)
			},
			configurable: true
		})
	
		Object.defineProperty(Function.prototype, 'onceStrict', {
			value: function () {
				return onceStrict(this)
			},
			configurable: true
		})
	})
	
	function once (fn) {
		var f = function () {
			if (f.called) return f.value
			f.called = true
			return f.value = fn.apply(this, arguments)
		}
		f.called = false
		return f
	}
	
	function onceStrict (fn) {
		var f = function () {
			if (f.called)
				throw new Error(f.onceError)
			f.called = true
			return f.value = fn.apply(this, arguments)
		}
		var name = fn.name || 'Function wrapped with `once`'
		f.onceError = name + " shouldn't be called more than once"
		f.called = false
		return f
	}
	
	},{"wrappy":120}],91:[function(require,module,exports){
	(function (process){
	'use strict';
	
	if (!process.version ||
			process.version.indexOf('v0.') === 0 ||
			process.version.indexOf('v1.') === 0 && process.version.indexOf('v1.8.') !== 0) {
		module.exports = { nextTick: nextTick };
	} else {
		module.exports = process
	}
	
	function nextTick(fn, arg1, arg2, arg3) {
		if (typeof fn !== 'function') {
			throw new TypeError('"callback" argument must be a function');
		}
		var len = arguments.length;
		var args, i;
		switch (len) {
		case 0:
		case 1:
			return process.nextTick(fn);
		case 2:
			return process.nextTick(function afterTickOne() {
				fn.call(null, arg1);
			});
		case 3:
			return process.nextTick(function afterTickTwo() {
				fn.call(null, arg1, arg2);
			});
		case 4:
			return process.nextTick(function afterTickThree() {
				fn.call(null, arg1, arg2, arg3);
			});
		default:
			args = new Array(len - 1);
			i = 0;
			while (i < args.length) {
				args[i++] = arguments[i];
			}
			return process.nextTick(function afterTick() {
				fn.apply(null, args);
			});
		}
	}
	
	
	}).call(this,require('_process'))
	},{"_process":92}],92:[function(require,module,exports){
	// shim for using process in browser
	var process = module.exports = {};
	
	// cached from whatever global is present so that test runners that stub it
	// don't break things.  But we need to wrap it in a try catch in case it is
	// wrapped in strict mode code which doesn't define any globals.  It's inside a
	// function because try/catches deoptimize in certain engines.
	
	var cachedSetTimeout;
	var cachedClearTimeout;
	
	function defaultSetTimout() {
			throw new Error('setTimeout has not been defined');
	}
	function defaultClearTimeout () {
			throw new Error('clearTimeout has not been defined');
	}
	(function () {
			try {
					if (typeof setTimeout === 'function') {
							cachedSetTimeout = setTimeout;
					} else {
							cachedSetTimeout = defaultSetTimout;
					}
			} catch (e) {
					cachedSetTimeout = defaultSetTimout;
			}
			try {
					if (typeof clearTimeout === 'function') {
							cachedClearTimeout = clearTimeout;
					} else {
							cachedClearTimeout = defaultClearTimeout;
					}
			} catch (e) {
					cachedClearTimeout = defaultClearTimeout;
			}
	} ())
	function runTimeout(fun) {
			if (cachedSetTimeout === setTimeout) {
					//normal enviroments in sane situations
					return setTimeout(fun, 0);
			}
			// if setTimeout wasn't available but was latter defined
			if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
					cachedSetTimeout = setTimeout;
					return setTimeout(fun, 0);
			}
			try {
					// when when somebody has screwed with setTimeout but no I.E. maddness
					return cachedSetTimeout(fun, 0);
			} catch(e){
					try {
							// When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
							return cachedSetTimeout.call(null, fun, 0);
					} catch(e){
							// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
							return cachedSetTimeout.call(this, fun, 0);
					}
			}
	
	
	}
	function runClearTimeout(marker) {
			if (cachedClearTimeout === clearTimeout) {
					//normal enviroments in sane situations
					return clearTimeout(marker);
			}
			// if clearTimeout wasn't available but was latter defined
			if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
					cachedClearTimeout = clearTimeout;
					return clearTimeout(marker);
			}
			try {
					// when when somebody has screwed with setTimeout but no I.E. maddness
					return cachedClearTimeout(marker);
			} catch (e){
					try {
							// When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
							return cachedClearTimeout.call(null, marker);
					} catch (e){
							// same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
							// Some versions of I.E. have different rules for clearTimeout vs setTimeout
							return cachedClearTimeout.call(this, marker);
					}
			}
	
	
	
	}
	var queue = [];
	var draining = false;
	var currentQueue;
	var queueIndex = -1;
	
	function cleanUpNextTick() {
			if (!draining || !currentQueue) {
					return;
			}
			draining = false;
			if (currentQueue.length) {
					queue = currentQueue.concat(queue);
			} else {
					queueIndex = -1;
			}
			if (queue.length) {
					drainQueue();
			}
	}
	
	function drainQueue() {
			if (draining) {
					return;
			}
			var timeout = runTimeout(cleanUpNextTick);
			draining = true;
	
			var len = queue.length;
			while(len) {
					currentQueue = queue;
					queue = [];
					while (++queueIndex < len) {
							if (currentQueue) {
									currentQueue[queueIndex].run();
							}
					}
					queueIndex = -1;
					len = queue.length;
			}
			currentQueue = null;
			draining = false;
			runClearTimeout(timeout);
	}
	
	process.nextTick = function (fun) {
			var args = new Array(arguments.length - 1);
			if (arguments.length > 1) {
					for (var i = 1; i < arguments.length; i++) {
							args[i - 1] = arguments[i];
					}
			}
			queue.push(new Item(fun, args));
			if (queue.length === 1 && !draining) {
					runTimeout(drainQueue);
			}
	};
	
	// v8 likes predictible objects
	function Item(fun, array) {
			this.fun = fun;
			this.array = array;
	}
	Item.prototype.run = function () {
			this.fun.apply(null, this.array);
	};
	process.title = 'browser';
	process.browser = true;
	process.env = {};
	process.argv = [];
	process.version = ''; // empty string to avoid regexp issues
	process.versions = {};
	
	function noop() {}
	
	process.on = noop;
	process.addListener = noop;
	process.once = noop;
	process.off = noop;
	process.removeListener = noop;
	process.removeAllListeners = noop;
	process.emit = noop;
	process.prependListener = noop;
	process.prependOnceListener = noop;
	
	process.listeners = function (name) { return [] }
	
	process.binding = function (name) {
			throw new Error('process.binding is not supported');
	};
	
	process.cwd = function () { return '/' };
	process.chdir = function (dir) {
			throw new Error('process.chdir is not supported');
	};
	process.umask = function() { return 0; };
	
	},{}],93:[function(require,module,exports){
	(function (global){
	/*! https://mths.be/punycode v1.4.1 by @mathias */
	;(function(root) {
	
		/** Detect free variables */
		var freeExports = typeof exports == 'object' && exports &&
			!exports.nodeType && exports;
		var freeModule = typeof module == 'object' && module &&
			!module.nodeType && module;
		var freeGlobal = typeof global == 'object' && global;
		if (
			freeGlobal.global === freeGlobal ||
			freeGlobal.window === freeGlobal ||
			freeGlobal.self === freeGlobal
		) {
			root = freeGlobal;
		}
	
		/**
		 * The `punycode` object.
		 * @name punycode
		 * @type Object
		 */
		var punycode,
	
		/** Highest positive signed 32-bit float value */
		maxInt = 2147483647, // aka. 0x7FFFFFFF or 2^31-1
	
		/** Bootstring parameters */
		base = 36,
		tMin = 1,
		tMax = 26,
		skew = 38,
		damp = 700,
		initialBias = 72,
		initialN = 128, // 0x80
		delimiter = '-', // '\x2D'
	
		/** Regular expressions */
		regexPunycode = /^xn--/,
		regexNonASCII = /[^\x20-\x7E]/, // unprintable ASCII chars + non-ASCII chars
		regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g, // RFC 3490 separators
	
		/** Error messages */
		errors = {
			'overflow': 'Overflow: input needs wider integers to process',
			'not-basic': 'Illegal input >= 0x80 (not a basic code point)',
			'invalid-input': 'Invalid input'
		},
	
		/** Convenience shortcuts */
		baseMinusTMin = base - tMin,
		floor = Math.floor,
		stringFromCharCode = String.fromCharCode,
	
		/** Temporary variable */
		key;
	
		/*--------------------------------------------------------------------------*/
	
		/**
		 * A generic error utility function.
		 * @private
		 * @param {String} type The error type.
		 * @returns {Error} Throws a `RangeError` with the applicable error message.
		 */
		function error(type) {
			throw new RangeError(errors[type]);
		}
	
		/**
		 * A generic `Array#map` utility function.
		 * @private
		 * @param {Array} array The array to iterate over.
		 * @param {Function} callback The function that gets called for every array
		 * item.
		 * @returns {Array} A new array of values returned by the callback function.
		 */
		function map(array, fn) {
			var length = array.length;
			var result = [];
			while (length--) {
				result[length] = fn(array[length]);
			}
			return result;
		}
	
		/**
		 * A simple `Array#map`-like wrapper to work with domain name strings or email
		 * addresses.
		 * @private
		 * @param {String} domain The domain name or email address.
		 * @param {Function} callback The function that gets called for every
		 * character.
		 * @returns {Array} A new string of characters returned by the callback
		 * function.
		 */
		function mapDomain(string, fn) {
			var parts = string.split('@');
			var result = '';
			if (parts.length > 1) {
				// In email addresses, only the domain name should be punycoded. Leave
				// the local part (i.e. everything up to `@`) intact.
				result = parts[0] + '@';
				string = parts[1];
			}
			// Avoid `split(regex)` for IE8 compatibility. See #17.
			string = string.replace(regexSeparators, '\x2E');
			var labels = string.split('.');
			var encoded = map(labels, fn).join('.');
			return result + encoded;
		}
	
		/**
		 * Creates an array containing the numeric code points of each Unicode
		 * character in the string. While JavaScript uses UCS-2 internally,
		 * this function will convert a pair of surrogate halves (each of which
		 * UCS-2 exposes as separate characters) into a single code point,
		 * matching UTF-16.
		 * @see `punycode.ucs2.encode`
		 * @see <https://mathiasbynens.be/notes/javascript-encoding>
		 * @memberOf punycode.ucs2
		 * @name decode
		 * @param {String} string The Unicode input string (UCS-2).
		 * @returns {Array} The new array of code points.
		 */
		function ucs2decode(string) {
			var output = [],
					counter = 0,
					length = string.length,
					value,
					extra;
			while (counter < length) {
				value = string.charCodeAt(counter++);
				if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
					// high surrogate, and there is a next character
					extra = string.charCodeAt(counter++);
					if ((extra & 0xFC00) == 0xDC00) { // low surrogate
						output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
					} else {
						// unmatched surrogate; only append this code unit, in case the next
						// code unit is the high surrogate of a surrogate pair
						output.push(value);
						counter--;
					}
				} else {
					output.push(value);
				}
			}
			return output;
		}
	
		/**
		 * Creates a string based on an array of numeric code points.
		 * @see `punycode.ucs2.decode`
		 * @memberOf punycode.ucs2
		 * @name encode
		 * @param {Array} codePoints The array of numeric code points.
		 * @returns {String} The new Unicode string (UCS-2).
		 */
		function ucs2encode(array) {
			return map(array, function(value) {
				var output = '';
				if (value > 0xFFFF) {
					value -= 0x10000;
					output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
					value = 0xDC00 | value & 0x3FF;
				}
				output += stringFromCharCode(value);
				return output;
			}).join('');
		}
	
		/**
		 * Converts a basic code point into a digit/integer.
		 * @see `digitToBasic()`
		 * @private
		 * @param {Number} codePoint The basic numeric code point value.
		 * @returns {Number} The numeric value of a basic code point (for use in
		 * representing integers) in the range `0` to `base - 1`, or `base` if
		 * the code point does not represent a value.
		 */
		function basicToDigit(codePoint) {
			if (codePoint - 48 < 10) {
				return codePoint - 22;
			}
			if (codePoint - 65 < 26) {
				return codePoint - 65;
			}
			if (codePoint - 97 < 26) {
				return codePoint - 97;
			}
			return base;
		}
	
		/**
		 * Converts a digit/integer into a basic code point.
		 * @see `basicToDigit()`
		 * @private
		 * @param {Number} digit The numeric value of a basic code point.
		 * @returns {Number} The basic code point whose value (when used for
		 * representing integers) is `digit`, which needs to be in the range
		 * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is
		 * used; else, the lowercase form is used. The behavior is undefined
		 * if `flag` is non-zero and `digit` has no uppercase form.
		 */
		function digitToBasic(digit, flag) {
			//  0..25 map to ASCII a..z or A..Z
			// 26..35 map to ASCII 0..9
			return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);
		}
	
		/**
		 * Bias adaptation function as per section 3.4 of RFC 3492.
		 * https://tools.ietf.org/html/rfc3492#section-3.4
		 * @private
		 */
		function adapt(delta, numPoints, firstTime) {
			var k = 0;
			delta = firstTime ? floor(delta / damp) : delta >> 1;
			delta += floor(delta / numPoints);
			for (/* no initialization */; delta > baseMinusTMin * tMax >> 1; k += base) {
				delta = floor(delta / baseMinusTMin);
			}
			return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));
		}
	
		/**
		 * Converts a Punycode string of ASCII-only symbols to a string of Unicode
		 * symbols.
		 * @memberOf punycode
		 * @param {String} input The Punycode string of ASCII-only symbols.
		 * @returns {String} The resulting string of Unicode symbols.
		 */
		function decode(input) {
			// Don't use UCS-2
			var output = [],
					inputLength = input.length,
					out,
					i = 0,
					n = initialN,
					bias = initialBias,
					basic,
					j,
					index,
					oldi,
					w,
					k,
					digit,
					t,
					/** Cached calculation results */
					baseMinusT;
	
			// Handle the basic code points: let `basic` be the number of input code
			// points before the last delimiter, or `0` if there is none, then copy
			// the first basic code points to the output.
	
			basic = input.lastIndexOf(delimiter);
			if (basic < 0) {
				basic = 0;
			}
	
			for (j = 0; j < basic; ++j) {
				// if it's not a basic code point
				if (input.charCodeAt(j) >= 0x80) {
					error('not-basic');
				}
				output.push(input.charCodeAt(j));
			}
	
			// Main decoding loop: start just after the last delimiter if any basic code
			// points were copied; start at the beginning otherwise.
	
			for (index = basic > 0 ? basic + 1 : 0; index < inputLength; /* no final expression */) {
	
				// `index` is the index of the next character to be consumed.
				// Decode a generalized variable-length integer into `delta`,
				// which gets added to `i`. The overflow checking is easier
				// if we increase `i` as we go, then subtract off its starting
				// value at the end to obtain `delta`.
				for (oldi = i, w = 1, k = base; /* no condition */; k += base) {
	
					if (index >= inputLength) {
						error('invalid-input');
					}
	
					digit = basicToDigit(input.charCodeAt(index++));
	
					if (digit >= base || digit > floor((maxInt - i) / w)) {
						error('overflow');
					}
	
					i += digit * w;
					t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
	
					if (digit < t) {
						break;
					}
	
					baseMinusT = base - t;
					if (w > floor(maxInt / baseMinusT)) {
						error('overflow');
					}
	
					w *= baseMinusT;
	
				}
	
				out = output.length + 1;
				bias = adapt(i - oldi, out, oldi == 0);
	
				// `i` was supposed to wrap around from `out` to `0`,
				// incrementing `n` each time, so we'll fix that now:
				if (floor(i / out) > maxInt - n) {
					error('overflow');
				}
	
				n += floor(i / out);
				i %= out;
	
				// Insert `n` at position `i` of the output
				output.splice(i++, 0, n);
	
			}
	
			return ucs2encode(output);
		}
	
		/**
		 * Converts a string of Unicode symbols (e.g. a domain name label) to a
		 * Punycode string of ASCII-only symbols.
		 * @memberOf punycode
		 * @param {String} input The string of Unicode symbols.
		 * @returns {String} The resulting Punycode string of ASCII-only symbols.
		 */
		function encode(input) {
			var n,
					delta,
					handledCPCount,
					basicLength,
					bias,
					j,
					m,
					q,
					k,
					t,
					currentValue,
					output = [],
					/** `inputLength` will hold the number of code points in `input`. */
					inputLength,
					/** Cached calculation results */
					handledCPCountPlusOne,
					baseMinusT,
					qMinusT;
	
			// Convert the input in UCS-2 to Unicode
			input = ucs2decode(input);
	
			// Cache the length
			inputLength = input.length;
	
			// Initialize the state
			n = initialN;
			delta = 0;
			bias = initialBias;
	
			// Handle the basic code points
			for (j = 0; j < inputLength; ++j) {
				currentValue = input[j];
				if (currentValue < 0x80) {
					output.push(stringFromCharCode(currentValue));
				}
			}
	
			handledCPCount = basicLength = output.length;
	
			// `handledCPCount` is the number of code points that have been handled;
			// `basicLength` is the number of basic code points.
	
			// Finish the basic string - if it is not empty - with a delimiter
			if (basicLength) {
				output.push(delimiter);
			}
	
			// Main encoding loop:
			while (handledCPCount < inputLength) {
	
				// All non-basic code points < n have been handled already. Find the next
				// larger one:
				for (m = maxInt, j = 0; j < inputLength; ++j) {
					currentValue = input[j];
					if (currentValue >= n && currentValue < m) {
						m = currentValue;
					}
				}
	
				// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,
				// but guard against overflow
				handledCPCountPlusOne = handledCPCount + 1;
				if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {
					error('overflow');
				}
	
				delta += (m - n) * handledCPCountPlusOne;
				n = m;
	
				for (j = 0; j < inputLength; ++j) {
					currentValue = input[j];
	
					if (currentValue < n && ++delta > maxInt) {
						error('overflow');
					}
	
					if (currentValue == n) {
						// Represent delta as a generalized variable-length integer
						for (q = delta, k = base; /* no condition */; k += base) {
							t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
							if (q < t) {
								break;
							}
							qMinusT = q - t;
							baseMinusT = base - t;
							output.push(
								stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0))
							);
							q = floor(qMinusT / baseMinusT);
						}
	
						output.push(stringFromCharCode(digitToBasic(q, 0)));
						bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
						delta = 0;
						++handledCPCount;
					}
				}
	
				++delta;
				++n;
	
			}
			return output.join('');
		}
	
		/**
		 * Converts a Punycode string representing a domain name or an email address
		 * to Unicode. Only the Punycoded parts of the input will be converted, i.e.
		 * it doesn't matter if you call it on a string that has already been
		 * converted to Unicode.
		 * @memberOf punycode
		 * @param {String} input The Punycoded domain name or email address to
		 * convert to Unicode.
		 * @returns {String} The Unicode representation of the given Punycode
		 * string.
		 */
		function toUnicode(input) {
			return mapDomain(input, function(string) {
				return regexPunycode.test(string)
					? decode(string.slice(4).toLowerCase())
					: string;
			});
		}
	
		/**
		 * Converts a Unicode string representing a domain name or an email address to
		 * Punycode. Only the non-ASCII parts of the domain name will be converted,
		 * i.e. it doesn't matter if you call it with a domain that's already in
		 * ASCII.
		 * @memberOf punycode
		 * @param {String} input The domain name or email address to convert, as a
		 * Unicode string.
		 * @returns {String} The Punycode representation of the given domain name or
		 * email address.
		 */
		function toASCII(input) {
			return mapDomain(input, function(string) {
				return regexNonASCII.test(string)
					? 'xn--' + encode(string)
					: string;
			});
		}
	
		/*--------------------------------------------------------------------------*/
	
		/** Define the public API */
		punycode = {
			/**
			 * A string representing the current Punycode.js version number.
			 * @memberOf punycode
			 * @type String
			 */
			'version': '1.4.1',
			/**
			 * An object of methods to convert from JavaScript's internal character
			 * representation (UCS-2) to Unicode code points, and back.
			 * @see <https://mathiasbynens.be/notes/javascript-encoding>
			 * @memberOf punycode
			 * @type Object
			 */
			'ucs2': {
				'decode': ucs2decode,
				'encode': ucs2encode
			},
			'decode': decode,
			'encode': encode,
			'toASCII': toASCII,
			'toUnicode': toUnicode
		};
	
		/** Expose `punycode` */
		// Some AMD build optimizers, like r.js, check for specific condition patterns
		// like the following:
		if (
			typeof define == 'function' &&
			typeof define.amd == 'object' &&
			define.amd
		) {
			define('punycode', function() {
				return punycode;
			});
		} else if (freeExports && freeModule) {
			if (module.exports == freeExports) {
				// in Node.js, io.js, or RingoJS v0.8.0+
				freeModule.exports = punycode;
			} else {
				// in Narwhal or RingoJS v0.7.0-
				for (key in punycode) {
					punycode.hasOwnProperty(key) && (freeExports[key] = punycode[key]);
				}
			}
		} else {
			// in Rhino or a web browser
			root.punycode = punycode;
		}
	
	}(this));
	
	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
	},{}],94:[function(require,module,exports){
	// Copyright Joyent, Inc. and other Node contributors.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a
	// copy of this software and associated documentation files (the
	// "Software"), to deal in the Software without restriction, including
	// without limitation the rights to use, copy, modify, merge, publish,
	// distribute, sublicense, and/or sell copies of the Software, and to permit
	// persons to whom the Software is furnished to do so, subject to the
	// following conditions:
	//
	// The above copyright notice and this permission notice shall be included
	// in all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
	// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
	// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	// USE OR OTHER DEALINGS IN THE SOFTWARE.
	
	'use strict';
	
	// If obj.hasOwnProperty has been overridden, then calling
	// obj.hasOwnProperty(prop) will break.
	// See: https://github.com/joyent/node/issues/1707
	function hasOwnProperty(obj, prop) {
		return Object.prototype.hasOwnProperty.call(obj, prop);
	}
	
	module.exports = function(qs, sep, eq, options) {
		sep = sep || '&';
		eq = eq || '=';
		var obj = {};
	
		if (typeof qs !== 'string' || qs.length === 0) {
			return obj;
		}
	
		var regexp = /\+/g;
		qs = qs.split(sep);
	
		var maxKeys = 1000;
		if (options && typeof options.maxKeys === 'number') {
			maxKeys = options.maxKeys;
		}
	
		var len = qs.length;
		// maxKeys <= 0 means that we should not limit keys count
		if (maxKeys > 0 && len > maxKeys) {
			len = maxKeys;
		}
	
		for (var i = 0; i < len; ++i) {
			var x = qs[i].replace(regexp, '%20'),
					idx = x.indexOf(eq),
					kstr, vstr, k, v;
	
			if (idx >= 0) {
				kstr = x.substr(0, idx);
				vstr = x.substr(idx + 1);
			} else {
				kstr = x;
				vstr = '';
			}
	
			k = decodeURIComponent(kstr);
			v = decodeURIComponent(vstr);
	
			if (!hasOwnProperty(obj, k)) {
				obj[k] = v;
			} else if (isArray(obj[k])) {
				obj[k].push(v);
			} else {
				obj[k] = [obj[k], v];
			}
		}
	
		return obj;
	};
	
	var isArray = Array.isArray || function (xs) {
		return Object.prototype.toString.call(xs) === '[object Array]';
	};
	
	},{}],95:[function(require,module,exports){
	// Copyright Joyent, Inc. and other Node contributors.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a
	// copy of this software and associated documentation files (the
	// "Software"), to deal in the Software without restriction, including
	// without limitation the rights to use, copy, modify, merge, publish,
	// distribute, sublicense, and/or sell copies of the Software, and to permit
	// persons to whom the Software is furnished to do so, subject to the
	// following conditions:
	//
	// The above copyright notice and this permission notice shall be included
	// in all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
	// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
	// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	// USE OR OTHER DEALINGS IN THE SOFTWARE.
	
	'use strict';
	
	var stringifyPrimitive = function(v) {
		switch (typeof v) {
			case 'string':
				return v;
	
			case 'boolean':
				return v ? 'true' : 'false';
	
			case 'number':
				return isFinite(v) ? v : '';
	
			default:
				return '';
		}
	};
	
	module.exports = function(obj, sep, eq, name) {
		sep = sep || '&';
		eq = eq || '=';
		if (obj === null) {
			obj = undefined;
		}
	
		if (typeof obj === 'object') {
			return map(objectKeys(obj), function(k) {
				var ks = encodeURIComponent(stringifyPrimitive(k)) + eq;
				if (isArray(obj[k])) {
					return map(obj[k], function(v) {
						return ks + encodeURIComponent(stringifyPrimitive(v));
					}).join(sep);
				} else {
					return ks + encodeURIComponent(stringifyPrimitive(obj[k]));
				}
			}).join(sep);
	
		}
	
		if (!name) return '';
		return encodeURIComponent(stringifyPrimitive(name)) + eq +
					 encodeURIComponent(stringifyPrimitive(obj));
	};
	
	var isArray = Array.isArray || function (xs) {
		return Object.prototype.toString.call(xs) === '[object Array]';
	};
	
	function map (xs, f) {
		if (xs.map) return xs.map(f);
		var res = [];
		for (var i = 0; i < xs.length; i++) {
			res.push(f(xs[i], i));
		}
		return res;
	}
	
	var objectKeys = Object.keys || function (obj) {
		var res = [];
		for (var key in obj) {
			if (Object.prototype.hasOwnProperty.call(obj, key)) res.push(key);
		}
		return res;
	};
	
	},{}],96:[function(require,module,exports){
	'use strict';
	
	exports.decode = exports.parse = require('./decode');
	exports.encode = exports.stringify = require('./encode');
	
	},{"./decode":94,"./encode":95}],97:[function(require,module,exports){
	module.exports = require('./lib/_stream_duplex.js');
	
	},{"./lib/_stream_duplex.js":98}],98:[function(require,module,exports){
	// Copyright Joyent, Inc. and other Node contributors.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a
	// copy of this software and associated documentation files (the
	// "Software"), to deal in the Software without restriction, including
	// without limitation the rights to use, copy, modify, merge, publish,
	// distribute, sublicense, and/or sell copies of the Software, and to permit
	// persons to whom the Software is furnished to do so, subject to the
	// following conditions:
	//
	// The above copyright notice and this permission notice shall be included
	// in all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
	// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
	// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	// USE OR OTHER DEALINGS IN THE SOFTWARE.
	
	// a duplex stream is just a stream that is both readable and writable.
	// Since JS doesn't have multiple prototypal inheritance, this class
	// prototypally inherits from Readable, and then parasitically from
	// Writable.
	
	'use strict';
	
	/*<replacement>*/
	
	var pna = require('process-nextick-args');
	/*</replacement>*/
	
	/*<replacement>*/
	var objectKeys = Object.keys || function (obj) {
		var keys = [];
		for (var key in obj) {
			keys.push(key);
		}return keys;
	};
	/*</replacement>*/
	
	module.exports = Duplex;
	
	/*<replacement>*/
	var util = require('core-util-is');
	util.inherits = require('inherits');
	/*</replacement>*/
	
	var Readable = require('./_stream_readable');
	var Writable = require('./_stream_writable');
	
	util.inherits(Duplex, Readable);
	
	{
		// avoid scope creep, the keys array can then be collected
		var keys = objectKeys(Writable.prototype);
		for (var v = 0; v < keys.length; v++) {
			var method = keys[v];
			if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method];
		}
	}
	
	function Duplex(options) {
		if (!(this instanceof Duplex)) return new Duplex(options);
	
		Readable.call(this, options);
		Writable.call(this, options);
	
		if (options && options.readable === false) this.readable = false;
	
		if (options && options.writable === false) this.writable = false;
	
		this.allowHalfOpen = true;
		if (options && options.allowHalfOpen === false) this.allowHalfOpen = false;
	
		this.once('end', onend);
	}
	
	Object.defineProperty(Duplex.prototype, 'writableHighWaterMark', {
		// making it explicit this property is not enumerable
		// because otherwise some prototype manipulation in
		// userland will fail
		enumerable: false,
		get: function () {
			return this._writableState.highWaterMark;
		}
	});
	
	// the no-half-open enforcer
	function onend() {
		// if we allow half-open state, or if the writable side ended,
		// then we're ok.
		if (this.allowHalfOpen || this._writableState.ended) return;
	
		// no more data can be written.
		// But allow more writes to happen in this tick.
		pna.nextTick(onEndNT, this);
	}
	
	function onEndNT(self) {
		self.end();
	}
	
	Object.defineProperty(Duplex.prototype, 'destroyed', {
		get: function () {
			if (this._readableState === undefined || this._writableState === undefined) {
				return false;
			}
			return this._readableState.destroyed && this._writableState.destroyed;
		},
		set: function (value) {
			// we ignore the value if the stream
			// has not been initialized yet
			if (this._readableState === undefined || this._writableState === undefined) {
				return;
			}
	
			// backward compatibility, the user is explicitly
			// managing destroyed
			this._readableState.destroyed = value;
			this._writableState.destroyed = value;
		}
	});
	
	Duplex.prototype._destroy = function (err, cb) {
		this.push(null);
		this.end();
	
		pna.nextTick(cb, err);
	};
	},{"./_stream_readable":100,"./_stream_writable":102,"core-util-is":14,"inherits":80,"process-nextick-args":91}],99:[function(require,module,exports){
	// Copyright Joyent, Inc. and other Node contributors.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a
	// copy of this software and associated documentation files (the
	// "Software"), to deal in the Software without restriction, including
	// without limitation the rights to use, copy, modify, merge, publish,
	// distribute, sublicense, and/or sell copies of the Software, and to permit
	// persons to whom the Software is furnished to do so, subject to the
	// following conditions:
	//
	// The above copyright notice and this permission notice shall be included
	// in all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
	// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
	// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	// USE OR OTHER DEALINGS IN THE SOFTWARE.
	
	// a passthrough stream.
	// basically just the most minimal sort of Transform stream.
	// Every written chunk gets output as-is.
	
	'use strict';
	
	module.exports = PassThrough;
	
	var Transform = require('./_stream_transform');
	
	/*<replacement>*/
	var util = require('core-util-is');
	util.inherits = require('inherits');
	/*</replacement>*/
	
	util.inherits(PassThrough, Transform);
	
	function PassThrough(options) {
		if (!(this instanceof PassThrough)) return new PassThrough(options);
	
		Transform.call(this, options);
	}
	
	PassThrough.prototype._transform = function (chunk, encoding, cb) {
		cb(null, chunk);
	};
	},{"./_stream_transform":101,"core-util-is":14,"inherits":80}],100:[function(require,module,exports){
	(function (process,global){
	// Copyright Joyent, Inc. and other Node contributors.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a
	// copy of this software and associated documentation files (the
	// "Software"), to deal in the Software without restriction, including
	// without limitation the rights to use, copy, modify, merge, publish,
	// distribute, sublicense, and/or sell copies of the Software, and to permit
	// persons to whom the Software is furnished to do so, subject to the
	// following conditions:
	//
	// The above copyright notice and this permission notice shall be included
	// in all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
	// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
	// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	// USE OR OTHER DEALINGS IN THE SOFTWARE.
	
	'use strict';
	
	/*<replacement>*/
	
	var pna = require('process-nextick-args');
	/*</replacement>*/
	
	module.exports = Readable;
	
	/*<replacement>*/
	var isArray = require('isarray');
	/*</replacement>*/
	
	/*<replacement>*/
	var Duplex;
	/*</replacement>*/
	
	Readable.ReadableState = ReadableState;
	
	/*<replacement>*/
	var EE = require('events').EventEmitter;
	
	var EElistenerCount = function (emitter, type) {
		return emitter.listeners(type).length;
	};
	/*</replacement>*/
	
	/*<replacement>*/
	var Stream = require('./internal/streams/stream');
	/*</replacement>*/
	
	/*<replacement>*/
	
	var Buffer = require('safe-buffer').Buffer;
	var OurUint8Array = global.Uint8Array || function () {};
	function _uint8ArrayToBuffer(chunk) {
		return Buffer.from(chunk);
	}
	function _isUint8Array(obj) {
		return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;
	}
	
	/*</replacement>*/
	
	/*<replacement>*/
	var util = require('core-util-is');
	util.inherits = require('inherits');
	/*</replacement>*/
	
	/*<replacement>*/
	var debugUtil = require('util');
	var debug = void 0;
	if (debugUtil && debugUtil.debuglog) {
		debug = debugUtil.debuglog('stream');
	} else {
		debug = function () {};
	}
	/*</replacement>*/
	
	var BufferList = require('./internal/streams/BufferList');
	var destroyImpl = require('./internal/streams/destroy');
	var StringDecoder;
	
	util.inherits(Readable, Stream);
	
	var kProxyEvents = ['error', 'close', 'destroy', 'pause', 'resume'];
	
	function prependListener(emitter, event, fn) {
		// Sadly this is not cacheable as some libraries bundle their own
		// event emitter implementation with them.
		if (typeof emitter.prependListener === 'function') return emitter.prependListener(event, fn);
	
		// This is a hack to make sure that our error handler is attached before any
		// userland ones.  NEVER DO THIS. This is here only because this code needs
		// to continue to work with older versions of Node.js that do not include
		// the prependListener() method. The goal is to eventually remove this hack.
		if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]];
	}
	
	function ReadableState(options, stream) {
		Duplex = Duplex || require('./_stream_duplex');
	
		options = options || {};
	
		// Duplex streams are both readable and writable, but share
		// the same options object.
		// However, some cases require setting options to different
		// values for the readable and the writable sides of the duplex stream.
		// These options can be provided separately as readableXXX and writableXXX.
		var isDuplex = stream instanceof Duplex;
	
		// object stream flag. Used to make read(n) ignore n and to
		// make all the buffer merging and length checks go away
		this.objectMode = !!options.objectMode;
	
		if (isDuplex) this.objectMode = this.objectMode || !!options.readableObjectMode;
	
		// the point at which it stops calling _read() to fill the buffer
		// Note: 0 is a valid value, means "don't call _read preemptively ever"
		var hwm = options.highWaterMark;
		var readableHwm = options.readableHighWaterMark;
		var defaultHwm = this.objectMode ? 16 : 16 * 1024;
	
		if (hwm || hwm === 0) this.highWaterMark = hwm;else if (isDuplex && (readableHwm || readableHwm === 0)) this.highWaterMark = readableHwm;else this.highWaterMark = defaultHwm;
	
		// cast to ints.
		this.highWaterMark = Math.floor(this.highWaterMark);
	
		// A linked list is used to store data chunks instead of an array because the
		// linked list can remove elements from the beginning faster than
		// array.shift()
		this.buffer = new BufferList();
		this.length = 0;
		this.pipes = null;
		this.pipesCount = 0;
		this.flowing = null;
		this.ended = false;
		this.endEmitted = false;
		this.reading = false;
	
		// a flag to be able to tell if the event 'readable'/'data' is emitted
		// immediately, or on a later tick.  We set this to true at first, because
		// any actions that shouldn't happen until "later" should generally also
		// not happen before the first read call.
		this.sync = true;
	
		// whenever we return null, then we set a flag to say
		// that we're awaiting a 'readable' event emission.
		this.needReadable = false;
		this.emittedReadable = false;
		this.readableListening = false;
		this.resumeScheduled = false;
	
		// has it been destroyed
		this.destroyed = false;
	
		// Crypto is kind of old and crusty.  Historically, its default string
		// encoding is 'binary' so we have to make this configurable.
		// Everything else in the universe uses 'utf8', though.
		this.defaultEncoding = options.defaultEncoding || 'utf8';
	
		// the number of writers that are awaiting a drain event in .pipe()s
		this.awaitDrain = 0;
	
		// if true, a maybeReadMore has been scheduled
		this.readingMore = false;
	
		this.decoder = null;
		this.encoding = null;
		if (options.encoding) {
			if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;
			this.decoder = new StringDecoder(options.encoding);
			this.encoding = options.encoding;
		}
	}
	
	function Readable(options) {
		Duplex = Duplex || require('./_stream_duplex');
	
		if (!(this instanceof Readable)) return new Readable(options);
	
		this._readableState = new ReadableState(options, this);
	
		// legacy
		this.readable = true;
	
		if (options) {
			if (typeof options.read === 'function') this._read = options.read;
	
			if (typeof options.destroy === 'function') this._destroy = options.destroy;
		}
	
		Stream.call(this);
	}
	
	Object.defineProperty(Readable.prototype, 'destroyed', {
		get: function () {
			if (this._readableState === undefined) {
				return false;
			}
			return this._readableState.destroyed;
		},
		set: function (value) {
			// we ignore the value if the stream
			// has not been initialized yet
			if (!this._readableState) {
				return;
			}
	
			// backward compatibility, the user is explicitly
			// managing destroyed
			this._readableState.destroyed = value;
		}
	});
	
	Readable.prototype.destroy = destroyImpl.destroy;
	Readable.prototype._undestroy = destroyImpl.undestroy;
	Readable.prototype._destroy = function (err, cb) {
		this.push(null);
		cb(err);
	};
	
	// Manually shove something into the read() buffer.
	// This returns true if the highWaterMark has not been hit yet,
	// similar to how Writable.write() returns true if you should
	// write() some more.
	Readable.prototype.push = function (chunk, encoding) {
		var state = this._readableState;
		var skipChunkCheck;
	
		if (!state.objectMode) {
			if (typeof chunk === 'string') {
				encoding = encoding || state.defaultEncoding;
				if (encoding !== state.encoding) {
					chunk = Buffer.from(chunk, encoding);
					encoding = '';
				}
				skipChunkCheck = true;
			}
		} else {
			skipChunkCheck = true;
		}
	
		return readableAddChunk(this, chunk, encoding, false, skipChunkCheck);
	};
	
	// Unshift should *always* be something directly out of read()
	Readable.prototype.unshift = function (chunk) {
		return readableAddChunk(this, chunk, null, true, false);
	};
	
	function readableAddChunk(stream, chunk, encoding, addToFront, skipChunkCheck) {
		var state = stream._readableState;
		if (chunk === null) {
			state.reading = false;
			onEofChunk(stream, state);
		} else {
			var er;
			if (!skipChunkCheck) er = chunkInvalid(state, chunk);
			if (er) {
				stream.emit('error', er);
			} else if (state.objectMode || chunk && chunk.length > 0) {
				if (typeof chunk !== 'string' && !state.objectMode && Object.getPrototypeOf(chunk) !== Buffer.prototype) {
					chunk = _uint8ArrayToBuffer(chunk);
				}
	
				if (addToFront) {
					if (state.endEmitted) stream.emit('error', new Error('stream.unshift() after end event'));else addChunk(stream, state, chunk, true);
				} else if (state.ended) {
					stream.emit('error', new Error('stream.push() after EOF'));
				} else {
					state.reading = false;
					if (state.decoder && !encoding) {
						chunk = state.decoder.write(chunk);
						if (state.objectMode || chunk.length !== 0) addChunk(stream, state, chunk, false);else maybeReadMore(stream, state);
					} else {
						addChunk(stream, state, chunk, false);
					}
				}
			} else if (!addToFront) {
				state.reading = false;
			}
		}
	
		return needMoreData(state);
	}
	
	function addChunk(stream, state, chunk, addToFront) {
		if (state.flowing && state.length === 0 && !state.sync) {
			stream.emit('data', chunk);
			stream.read(0);
		} else {
			// update the buffer info.
			state.length += state.objectMode ? 1 : chunk.length;
			if (addToFront) state.buffer.unshift(chunk);else state.buffer.push(chunk);
	
			if (state.needReadable) emitReadable(stream);
		}
		maybeReadMore(stream, state);
	}
	
	function chunkInvalid(state, chunk) {
		var er;
		if (!_isUint8Array(chunk) && typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {
			er = new TypeError('Invalid non-string/buffer chunk');
		}
		return er;
	}
	
	// if it's past the high water mark, we can push in some more.
	// Also, if we have no data yet, we can stand some
	// more bytes.  This is to work around cases where hwm=0,
	// such as the repl.  Also, if the push() triggered a
	// readable event, and the user called read(largeNumber) such that
	// needReadable was set, then we ought to push more, so that another
	// 'readable' event will be triggered.
	function needMoreData(state) {
		return !state.ended && (state.needReadable || state.length < state.highWaterMark || state.length === 0);
	}
	
	Readable.prototype.isPaused = function () {
		return this._readableState.flowing === false;
	};
	
	// backwards compatibility.
	Readable.prototype.setEncoding = function (enc) {
		if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;
		this._readableState.decoder = new StringDecoder(enc);
		this._readableState.encoding = enc;
		return this;
	};
	
	// Don't raise the hwm > 8MB
	var MAX_HWM = 0x800000;
	function computeNewHighWaterMark(n) {
		if (n >= MAX_HWM) {
			n = MAX_HWM;
		} else {
			// Get the next highest power of 2 to prevent increasing hwm excessively in
			// tiny amounts
			n--;
			n |= n >>> 1;
			n |= n >>> 2;
			n |= n >>> 4;
			n |= n >>> 8;
			n |= n >>> 16;
			n++;
		}
		return n;
	}
	
	// This function is designed to be inlinable, so please take care when making
	// changes to the function body.
	function howMuchToRead(n, state) {
		if (n <= 0 || state.length === 0 && state.ended) return 0;
		if (state.objectMode) return 1;
		if (n !== n) {
			// Only flow one buffer at a time
			if (state.flowing && state.length) return state.buffer.head.data.length;else return state.length;
		}
		// If we're asking for more than the current hwm, then raise the hwm.
		if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n);
		if (n <= state.length) return n;
		// Don't have enough
		if (!state.ended) {
			state.needReadable = true;
			return 0;
		}
		return state.length;
	}
	
	// you can override either this method, or the async _read(n) below.
	Readable.prototype.read = function (n) {
		debug('read', n);
		n = parseInt(n, 10);
		var state = this._readableState;
		var nOrig = n;
	
		if (n !== 0) state.emittedReadable = false;
	
		// if we're doing read(0) to trigger a readable event, but we
		// already have a bunch of data in the buffer, then just trigger
		// the 'readable' event and move on.
		if (n === 0 && state.needReadable && (state.length >= state.highWaterMark || state.ended)) {
			debug('read: emitReadable', state.length, state.ended);
			if (state.length === 0 && state.ended) endReadable(this);else emitReadable(this);
			return null;
		}
	
		n = howMuchToRead(n, state);
	
		// if we've ended, and we're now clear, then finish it up.
		if (n === 0 && state.ended) {
			if (state.length === 0) endReadable(this);
			return null;
		}
	
		// All the actual chunk generation logic needs to be
		// *below* the call to _read.  The reason is that in certain
		// synthetic stream cases, such as passthrough streams, _read
		// may be a completely synchronous operation which may change
		// the state of the read buffer, providing enough data when
		// before there was *not* enough.
		//
		// So, the steps are:
		// 1. Figure out what the state of things will be after we do
		// a read from the buffer.
		//
		// 2. If that resulting state will trigger a _read, then call _read.
		// Note that this may be asynchronous, or synchronous.  Yes, it is
		// deeply ugly to write APIs this way, but that still doesn't mean
		// that the Readable class should behave improperly, as streams are
		// designed to be sync/async agnostic.
		// Take note if the _read call is sync or async (ie, if the read call
		// has returned yet), so that we know whether or not it's safe to emit
		// 'readable' etc.
		//
		// 3. Actually pull the requested chunks out of the buffer and return.
	
		// if we need a readable event, then we need to do some reading.
		var doRead = state.needReadable;
		debug('need readable', doRead);
	
		// if we currently have less than the highWaterMark, then also read some
		if (state.length === 0 || state.length - n < state.highWaterMark) {
			doRead = true;
			debug('length less than watermark', doRead);
		}
	
		// however, if we've ended, then there's no point, and if we're already
		// reading, then it's unnecessary.
		if (state.ended || state.reading) {
			doRead = false;
			debug('reading or ended', doRead);
		} else if (doRead) {
			debug('do read');
			state.reading = true;
			state.sync = true;
			// if the length is currently zero, then we *need* a readable event.
			if (state.length === 0) state.needReadable = true;
			// call internal read method
			this._read(state.highWaterMark);
			state.sync = false;
			// If _read pushed data synchronously, then `reading` will be false,
			// and we need to re-evaluate how much data we can return to the user.
			if (!state.reading) n = howMuchToRead(nOrig, state);
		}
	
		var ret;
		if (n > 0) ret = fromList(n, state);else ret = null;
	
		if (ret === null) {
			state.needReadable = true;
			n = 0;
		} else {
			state.length -= n;
		}
	
		if (state.length === 0) {
			// If we have nothing in the buffer, then we want to know
			// as soon as we *do* get something into the buffer.
			if (!state.ended) state.needReadable = true;
	
			// If we tried to read() past the EOF, then emit end on the next tick.
			if (nOrig !== n && state.ended) endReadable(this);
		}
	
		if (ret !== null) this.emit('data', ret);
	
		return ret;
	};
	
	function onEofChunk(stream, state) {
		if (state.ended) return;
		if (state.decoder) {
			var chunk = state.decoder.end();
			if (chunk && chunk.length) {
				state.buffer.push(chunk);
				state.length += state.objectMode ? 1 : chunk.length;
			}
		}
		state.ended = true;
	
		// emit 'readable' now to make sure it gets picked up.
		emitReadable(stream);
	}
	
	// Don't emit readable right away in sync mode, because this can trigger
	// another read() call => stack overflow.  This way, it might trigger
	// a nextTick recursion warning, but that's not so bad.
	function emitReadable(stream) {
		var state = stream._readableState;
		state.needReadable = false;
		if (!state.emittedReadable) {
			debug('emitReadable', state.flowing);
			state.emittedReadable = true;
			if (state.sync) pna.nextTick(emitReadable_, stream);else emitReadable_(stream);
		}
	}
	
	function emitReadable_(stream) {
		debug('emit readable');
		stream.emit('readable');
		flow(stream);
	}
	
	// at this point, the user has presumably seen the 'readable' event,
	// and called read() to consume some data.  that may have triggered
	// in turn another _read(n) call, in which case reading = true if
	// it's in progress.
	// However, if we're not ended, or reading, and the length < hwm,
	// then go ahead and try to read some more preemptively.
	function maybeReadMore(stream, state) {
		if (!state.readingMore) {
			state.readingMore = true;
			pna.nextTick(maybeReadMore_, stream, state);
		}
	}
	
	function maybeReadMore_(stream, state) {
		var len = state.length;
		while (!state.reading && !state.flowing && !state.ended && state.length < state.highWaterMark) {
			debug('maybeReadMore read 0');
			stream.read(0);
			if (len === state.length)
				// didn't get any data, stop spinning.
				break;else len = state.length;
		}
		state.readingMore = false;
	}
	
	// abstract method.  to be overridden in specific implementation classes.
	// call cb(er, data) where data is <= n in length.
	// for virtual (non-string, non-buffer) streams, "length" is somewhat
	// arbitrary, and perhaps not very meaningful.
	Readable.prototype._read = function (n) {
		this.emit('error', new Error('_read() is not implemented'));
	};
	
	Readable.prototype.pipe = function (dest, pipeOpts) {
		var src = this;
		var state = this._readableState;
	
		switch (state.pipesCount) {
			case 0:
				state.pipes = dest;
				break;
			case 1:
				state.pipes = [state.pipes, dest];
				break;
			default:
				state.pipes.push(dest);
				break;
		}
		state.pipesCount += 1;
		debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);
	
		var doEnd = (!pipeOpts || pipeOpts.end !== false) && dest !== process.stdout && dest !== process.stderr;
	
		var endFn = doEnd ? onend : unpipe;
		if (state.endEmitted) pna.nextTick(endFn);else src.once('end', endFn);
	
		dest.on('unpipe', onunpipe);
		function onunpipe(readable, unpipeInfo) {
			debug('onunpipe');
			if (readable === src) {
				if (unpipeInfo && unpipeInfo.hasUnpiped === false) {
					unpipeInfo.hasUnpiped = true;
					cleanup();
				}
			}
		}
	
		function onend() {
			debug('onend');
			dest.end();
		}
	
		// when the dest drains, it reduces the awaitDrain counter
		// on the source.  This would be more elegant with a .once()
		// handler in flow(), but adding and removing repeatedly is
		// too slow.
		var ondrain = pipeOnDrain(src);
		dest.on('drain', ondrain);
	
		var cleanedUp = false;
		function cleanup() {
			debug('cleanup');
			// cleanup event handlers once the pipe is broken
			dest.removeListener('close', onclose);
			dest.removeListener('finish', onfinish);
			dest.removeListener('drain', ondrain);
			dest.removeListener('error', onerror);
			dest.removeListener('unpipe', onunpipe);
			src.removeListener('end', onend);
			src.removeListener('end', unpipe);
			src.removeListener('data', ondata);
	
			cleanedUp = true;
	
			// if the reader is waiting for a drain event from this
			// specific writer, then it would cause it to never start
			// flowing again.
			// So, if this is awaiting a drain, then we just call it now.
			// If we don't know, then assume that we are waiting for one.
			if (state.awaitDrain && (!dest._writableState || dest._writableState.needDrain)) ondrain();
		}
	
		// If the user pushes more data while we're writing to dest then we'll end up
		// in ondata again. However, we only want to increase awaitDrain once because
		// dest will only emit one 'drain' event for the multiple writes.
		// => Introduce a guard on increasing awaitDrain.
		var increasedAwaitDrain = false;
		src.on('data', ondata);
		function ondata(chunk) {
			debug('ondata');
			increasedAwaitDrain = false;
			var ret = dest.write(chunk);
			if (false === ret && !increasedAwaitDrain) {
				// If the user unpiped during `dest.write()`, it is possible
				// to get stuck in a permanently paused state if that write
				// also returned false.
				// => Check whether `dest` is still a piping destination.
				if ((state.pipesCount === 1 && state.pipes === dest || state.pipesCount > 1 && indexOf(state.pipes, dest) !== -1) && !cleanedUp) {
					debug('false write response, pause', src._readableState.awaitDrain);
					src._readableState.awaitDrain++;
					increasedAwaitDrain = true;
				}
				src.pause();
			}
		}
	
		// if the dest has an error, then stop piping into it.
		// however, don't suppress the throwing behavior for this.
		function onerror(er) {
			debug('onerror', er);
			unpipe();
			dest.removeListener('error', onerror);
			if (EElistenerCount(dest, 'error') === 0) dest.emit('error', er);
		}
	
		// Make sure our error handler is attached before userland ones.
		prependListener(dest, 'error', onerror);
	
		// Both close and finish should trigger unpipe, but only once.
		function onclose() {
			dest.removeListener('finish', onfinish);
			unpipe();
		}
		dest.once('close', onclose);
		function onfinish() {
			debug('onfinish');
			dest.removeListener('close', onclose);
			unpipe();
		}
		dest.once('finish', onfinish);
	
		function unpipe() {
			debug('unpipe');
			src.unpipe(dest);
		}
	
		// tell the dest that it's being piped to
		dest.emit('pipe', src);
	
		// start the flow if it hasn't been started already.
		if (!state.flowing) {
			debug('pipe resume');
			src.resume();
		}
	
		return dest;
	};
	
	function pipeOnDrain(src) {
		return function () {
			var state = src._readableState;
			debug('pipeOnDrain', state.awaitDrain);
			if (state.awaitDrain) state.awaitDrain--;
			if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) {
				state.flowing = true;
				flow(src);
			}
		};
	}
	
	Readable.prototype.unpipe = function (dest) {
		var state = this._readableState;
		var unpipeInfo = { hasUnpiped: false };
	
		// if we're not piping anywhere, then do nothing.
		if (state.pipesCount === 0) return this;
	
		// just one destination.  most common case.
		if (state.pipesCount === 1) {
			// passed in one, but it's not the right one.
			if (dest && dest !== state.pipes) return this;
	
			if (!dest) dest = state.pipes;
	
			// got a match.
			state.pipes = null;
			state.pipesCount = 0;
			state.flowing = false;
			if (dest) dest.emit('unpipe', this, unpipeInfo);
			return this;
		}
	
		// slow case. multiple pipe destinations.
	
		if (!dest) {
			// remove all.
			var dests = state.pipes;
			var len = state.pipesCount;
			state.pipes = null;
			state.pipesCount = 0;
			state.flowing = false;
	
			for (var i = 0; i < len; i++) {
				dests[i].emit('unpipe', this, unpipeInfo);
			}return this;
		}
	
		// try to find the right one.
		var index = indexOf(state.pipes, dest);
		if (index === -1) return this;
	
		state.pipes.splice(index, 1);
		state.pipesCount -= 1;
		if (state.pipesCount === 1) state.pipes = state.pipes[0];
	
		dest.emit('unpipe', this, unpipeInfo);
	
		return this;
	};
	
	// set up data events if they are asked for
	// Ensure readable listeners eventually get something
	Readable.prototype.on = function (ev, fn) {
		var res = Stream.prototype.on.call(this, ev, fn);
	
		if (ev === 'data') {
			// Start flowing on next tick if stream isn't explicitly paused
			if (this._readableState.flowing !== false) this.resume();
		} else if (ev === 'readable') {
			var state = this._readableState;
			if (!state.endEmitted && !state.readableListening) {
				state.readableListening = state.needReadable = true;
				state.emittedReadable = false;
				if (!state.reading) {
					pna.nextTick(nReadingNextTick, this);
				} else if (state.length) {
					emitReadable(this);
				}
			}
		}
	
		return res;
	};
	Readable.prototype.addListener = Readable.prototype.on;
	
	function nReadingNextTick(self) {
		debug('readable nexttick read 0');
		self.read(0);
	}
	
	// pause() and resume() are remnants of the legacy readable stream API
	// If the user uses them, then switch into old mode.
	Readable.prototype.resume = function () {
		var state = this._readableState;
		if (!state.flowing) {
			debug('resume');
			state.flowing = true;
			resume(this, state);
		}
		return this;
	};
	
	function resume(stream, state) {
		if (!state.resumeScheduled) {
			state.resumeScheduled = true;
			pna.nextTick(resume_, stream, state);
		}
	}
	
	function resume_(stream, state) {
		if (!state.reading) {
			debug('resume read 0');
			stream.read(0);
		}
	
		state.resumeScheduled = false;
		state.awaitDrain = 0;
		stream.emit('resume');
		flow(stream);
		if (state.flowing && !state.reading) stream.read(0);
	}
	
	Readable.prototype.pause = function () {
		debug('call pause flowing=%j', this._readableState.flowing);
		if (false !== this._readableState.flowing) {
			debug('pause');
			this._readableState.flowing = false;
			this.emit('pause');
		}
		return this;
	};
	
	function flow(stream) {
		var state = stream._readableState;
		debug('flow', state.flowing);
		while (state.flowing && stream.read() !== null) {}
	}
	
	// wrap an old-style stream as the async data source.
	// This is *not* part of the readable stream interface.
	// It is an ugly unfortunate mess of history.
	Readable.prototype.wrap = function (stream) {
		var _this = this;
	
		var state = this._readableState;
		var paused = false;
	
		stream.on('end', function () {
			debug('wrapped end');
			if (state.decoder && !state.ended) {
				var chunk = state.decoder.end();
				if (chunk && chunk.length) _this.push(chunk);
			}
	
			_this.push(null);
		});
	
		stream.on('data', function (chunk) {
			debug('wrapped data');
			if (state.decoder) chunk = state.decoder.write(chunk);
	
			// don't skip over falsy values in objectMode
			if (state.objectMode && (chunk === null || chunk === undefined)) return;else if (!state.objectMode && (!chunk || !chunk.length)) return;
	
			var ret = _this.push(chunk);
			if (!ret) {
				paused = true;
				stream.pause();
			}
		});
	
		// proxy all the other methods.
		// important when wrapping filters and duplexes.
		for (var i in stream) {
			if (this[i] === undefined && typeof stream[i] === 'function') {
				this[i] = function (method) {
					return function () {
						return stream[method].apply(stream, arguments);
					};
				}(i);
			}
		}
	
		// proxy certain important events.
		for (var n = 0; n < kProxyEvents.length; n++) {
			stream.on(kProxyEvents[n], this.emit.bind(this, kProxyEvents[n]));
		}
	
		// when we try to consume some more bytes, simply unpause the
		// underlying stream.
		this._read = function (n) {
			debug('wrapped _read', n);
			if (paused) {
				paused = false;
				stream.resume();
			}
		};
	
		return this;
	};
	
	Object.defineProperty(Readable.prototype, 'readableHighWaterMark', {
		// making it explicit this property is not enumerable
		// because otherwise some prototype manipulation in
		// userland will fail
		enumerable: false,
		get: function () {
			return this._readableState.highWaterMark;
		}
	});
	
	// exposed for testing purposes only.
	Readable._fromList = fromList;
	
	// Pluck off n bytes from an array of buffers.
	// Length is the combined lengths of all the buffers in the list.
	// This function is designed to be inlinable, so please take care when making
	// changes to the function body.
	function fromList(n, state) {
		// nothing buffered
		if (state.length === 0) return null;
	
		var ret;
		if (state.objectMode) ret = state.buffer.shift();else if (!n || n >= state.length) {
			// read it all, truncate the list
			if (state.decoder) ret = state.buffer.join('');else if (state.buffer.length === 1) ret = state.buffer.head.data;else ret = state.buffer.concat(state.length);
			state.buffer.clear();
		} else {
			// read part of list
			ret = fromListPartial(n, state.buffer, state.decoder);
		}
	
		return ret;
	}
	
	// Extracts only enough buffered data to satisfy the amount requested.
	// This function is designed to be inlinable, so please take care when making
	// changes to the function body.
	function fromListPartial(n, list, hasStrings) {
		var ret;
		if (n < list.head.data.length) {
			// slice is the same for buffers and strings
			ret = list.head.data.slice(0, n);
			list.head.data = list.head.data.slice(n);
		} else if (n === list.head.data.length) {
			// first chunk is a perfect match
			ret = list.shift();
		} else {
			// result spans more than one buffer
			ret = hasStrings ? copyFromBufferString(n, list) : copyFromBuffer(n, list);
		}
		return ret;
	}
	
	// Copies a specified amount of characters from the list of buffered data
	// chunks.
	// This function is designed to be inlinable, so please take care when making
	// changes to the function body.
	function copyFromBufferString(n, list) {
		var p = list.head;
		var c = 1;
		var ret = p.data;
		n -= ret.length;
		while (p = p.next) {
			var str = p.data;
			var nb = n > str.length ? str.length : n;
			if (nb === str.length) ret += str;else ret += str.slice(0, n);
			n -= nb;
			if (n === 0) {
				if (nb === str.length) {
					++c;
					if (p.next) list.head = p.next;else list.head = list.tail = null;
				} else {
					list.head = p;
					p.data = str.slice(nb);
				}
				break;
			}
			++c;
		}
		list.length -= c;
		return ret;
	}
	
	// Copies a specified amount of bytes from the list of buffered data chunks.
	// This function is designed to be inlinable, so please take care when making
	// changes to the function body.
	function copyFromBuffer(n, list) {
		var ret = Buffer.allocUnsafe(n);
		var p = list.head;
		var c = 1;
		p.data.copy(ret);
		n -= p.data.length;
		while (p = p.next) {
			var buf = p.data;
			var nb = n > buf.length ? buf.length : n;
			buf.copy(ret, ret.length - n, 0, nb);
			n -= nb;
			if (n === 0) {
				if (nb === buf.length) {
					++c;
					if (p.next) list.head = p.next;else list.head = list.tail = null;
				} else {
					list.head = p;
					p.data = buf.slice(nb);
				}
				break;
			}
			++c;
		}
		list.length -= c;
		return ret;
	}
	
	function endReadable(stream) {
		var state = stream._readableState;
	
		// If we get here before consuming all the bytes, then that is a
		// bug in node.  Should never happen.
		if (state.length > 0) throw new Error('"endReadable()" called on non-empty stream');
	
		if (!state.endEmitted) {
			state.ended = true;
			pna.nextTick(endReadableNT, state, stream);
		}
	}
	
	function endReadableNT(state, stream) {
		// Check that we didn't get one last unshift.
		if (!state.endEmitted && state.length === 0) {
			state.endEmitted = true;
			stream.readable = false;
			stream.emit('end');
		}
	}
	
	function indexOf(xs, x) {
		for (var i = 0, l = xs.length; i < l; i++) {
			if (xs[i] === x) return i;
		}
		return -1;
	}
	}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
	},{"./_stream_duplex":98,"./internal/streams/BufferList":103,"./internal/streams/destroy":104,"./internal/streams/stream":105,"_process":92,"core-util-is":14,"events":13,"inherits":80,"isarray":106,"process-nextick-args":91,"safe-buffer":110,"string_decoder/":107,"util":11}],101:[function(require,module,exports){
	// Copyright Joyent, Inc. and other Node contributors.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a
	// copy of this software and associated documentation files (the
	// "Software"), to deal in the Software without restriction, including
	// without limitation the rights to use, copy, modify, merge, publish,
	// distribute, sublicense, and/or sell copies of the Software, and to permit
	// persons to whom the Software is furnished to do so, subject to the
	// following conditions:
	//
	// The above copyright notice and this permission notice shall be included
	// in all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
	// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
	// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	// USE OR OTHER DEALINGS IN THE SOFTWARE.
	
	// a transform stream is a readable/writable stream where you do
	// something with the data.  Sometimes it's called a "filter",
	// but that's not a great name for it, since that implies a thing where
	// some bits pass through, and others are simply ignored.  (That would
	// be a valid example of a transform, of course.)
	//
	// While the output is causally related to the input, it's not a
	// necessarily symmetric or synchronous transformation.  For example,
	// a zlib stream might take multiple plain-text writes(), and then
	// emit a single compressed chunk some time in the future.
	//
	// Here's how this works:
	//
	// The Transform stream has all the aspects of the readable and writable
	// stream classes.  When you write(chunk), that calls _write(chunk,cb)
	// internally, and returns false if there's a lot of pending writes
	// buffered up.  When you call read(), that calls _read(n) until
	// there's enough pending readable data buffered up.
	//
	// In a transform stream, the written data is placed in a buffer.  When
	// _read(n) is called, it transforms the queued up data, calling the
	// buffered _write cb's as it consumes chunks.  If consuming a single
	// written chunk would result in multiple output chunks, then the first
	// outputted bit calls the readcb, and subsequent chunks just go into
	// the read buffer, and will cause it to emit 'readable' if necessary.
	//
	// This way, back-pressure is actually determined by the reading side,
	// since _read has to be called to start processing a new chunk.  However,
	// a pathological inflate type of transform can cause excessive buffering
	// here.  For example, imagine a stream where every byte of input is
	// interpreted as an integer from 0-255, and then results in that many
	// bytes of output.  Writing the 4 bytes {ff,ff,ff,ff} would result in
	// 1kb of data being output.  In this case, you could write a very small
	// amount of input, and end up with a very large amount of output.  In
	// such a pathological inflating mechanism, there'd be no way to tell
	// the system to stop doing the transform.  A single 4MB write could
	// cause the system to run out of memory.
	//
	// However, even in such a pathological case, only a single written chunk
	// would be consumed, and then the rest would wait (un-transformed) until
	// the results of the previous transformed chunk were consumed.
	
	'use strict';
	
	module.exports = Transform;
	
	var Duplex = require('./_stream_duplex');
	
	/*<replacement>*/
	var util = require('core-util-is');
	util.inherits = require('inherits');
	/*</replacement>*/
	
	util.inherits(Transform, Duplex);
	
	function afterTransform(er, data) {
		var ts = this._transformState;
		ts.transforming = false;
	
		var cb = ts.writecb;
	
		if (!cb) {
			return this.emit('error', new Error('write callback called multiple times'));
		}
	
		ts.writechunk = null;
		ts.writecb = null;
	
		if (data != null) // single equals check for both `null` and `undefined`
			this.push(data);
	
		cb(er);
	
		var rs = this._readableState;
		rs.reading = false;
		if (rs.needReadable || rs.length < rs.highWaterMark) {
			this._read(rs.highWaterMark);
		}
	}
	
	function Transform(options) {
		if (!(this instanceof Transform)) return new Transform(options);
	
		Duplex.call(this, options);
	
		this._transformState = {
			afterTransform: afterTransform.bind(this),
			needTransform: false,
			transforming: false,
			writecb: null,
			writechunk: null,
			writeencoding: null
		};
	
		// start out asking for a readable event once data is transformed.
		this._readableState.needReadable = true;
	
		// we have implemented the _read method, and done the other things
		// that Readable wants before the first _read call, so unset the
		// sync guard flag.
		this._readableState.sync = false;
	
		if (options) {
			if (typeof options.transform === 'function') this._transform = options.transform;
	
			if (typeof options.flush === 'function') this._flush = options.flush;
		}
	
		// When the writable side finishes, then flush out anything remaining.
		this.on('prefinish', prefinish);
	}
	
	function prefinish() {
		var _this = this;
	
		if (typeof this._flush === 'function') {
			this._flush(function (er, data) {
				done(_this, er, data);
			});
		} else {
			done(this, null, null);
		}
	}
	
	Transform.prototype.push = function (chunk, encoding) {
		this._transformState.needTransform = false;
		return Duplex.prototype.push.call(this, chunk, encoding);
	};
	
	// This is the part where you do stuff!
	// override this function in implementation classes.
	// 'chunk' is an input chunk.
	//
	// Call `push(newChunk)` to pass along transformed output
	// to the readable side.  You may call 'push' zero or more times.
	//
	// Call `cb(err)` when you are done with this chunk.  If you pass
	// an error, then that'll put the hurt on the whole operation.  If you
	// never call cb(), then you'll never get another chunk.
	Transform.prototype._transform = function (chunk, encoding, cb) {
		throw new Error('_transform() is not implemented');
	};
	
	Transform.prototype._write = function (chunk, encoding, cb) {
		var ts = this._transformState;
		ts.writecb = cb;
		ts.writechunk = chunk;
		ts.writeencoding = encoding;
		if (!ts.transforming) {
			var rs = this._readableState;
			if (ts.needTransform || rs.needReadable || rs.length < rs.highWaterMark) this._read(rs.highWaterMark);
		}
	};
	
	// Doesn't matter what the args are here.
	// _transform does all the work.
	// That we got here means that the readable side wants more data.
	Transform.prototype._read = function (n) {
		var ts = this._transformState;
	
		if (ts.writechunk !== null && ts.writecb && !ts.transforming) {
			ts.transforming = true;
			this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);
		} else {
			// mark that we need a transform, so that any data that comes in
			// will get processed, now that we've asked for it.
			ts.needTransform = true;
		}
	};
	
	Transform.prototype._destroy = function (err, cb) {
		var _this2 = this;
	
		Duplex.prototype._destroy.call(this, err, function (err2) {
			cb(err2);
			_this2.emit('close');
		});
	};
	
	function done(stream, er, data) {
		if (er) return stream.emit('error', er);
	
		if (data != null) // single equals check for both `null` and `undefined`
			stream.push(data);
	
		// if there's nothing in the write buffer, then that means
		// that nothing more will ever be provided
		if (stream._writableState.length) throw new Error('Calling transform done when ws.length != 0');
	
		if (stream._transformState.transforming) throw new Error('Calling transform done when still transforming');
	
		return stream.push(null);
	}
	},{"./_stream_duplex":98,"core-util-is":14,"inherits":80}],102:[function(require,module,exports){
	(function (process,global,setImmediate){
	// Copyright Joyent, Inc. and other Node contributors.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a
	// copy of this software and associated documentation files (the
	// "Software"), to deal in the Software without restriction, including
	// without limitation the rights to use, copy, modify, merge, publish,
	// distribute, sublicense, and/or sell copies of the Software, and to permit
	// persons to whom the Software is furnished to do so, subject to the
	// following conditions:
	//
	// The above copyright notice and this permission notice shall be included
	// in all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
	// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
	// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	// USE OR OTHER DEALINGS IN THE SOFTWARE.
	
	// A bit simpler than readable streams.
	// Implement an async ._write(chunk, encoding, cb), and it'll handle all
	// the drain event emission and buffering.
	
	'use strict';
	
	/*<replacement>*/
	
	var pna = require('process-nextick-args');
	/*</replacement>*/
	
	module.exports = Writable;
	
	/* <replacement> */
	function WriteReq(chunk, encoding, cb) {
		this.chunk = chunk;
		this.encoding = encoding;
		this.callback = cb;
		this.next = null;
	}
	
	// It seems a linked list but it is not
	// there will be only 2 of these for each stream
	function CorkedRequest(state) {
		var _this = this;
	
		this.next = null;
		this.entry = null;
		this.finish = function () {
			onCorkedFinish(_this, state);
		};
	}
	/* </replacement> */
	
	/*<replacement>*/
	var asyncWrite = !process.browser && ['v0.10', 'v0.9.'].indexOf(process.version.slice(0, 5)) > -1 ? setImmediate : pna.nextTick;
	/*</replacement>*/
	
	/*<replacement>*/
	var Duplex;
	/*</replacement>*/
	
	Writable.WritableState = WritableState;
	
	/*<replacement>*/
	var util = require('core-util-is');
	util.inherits = require('inherits');
	/*</replacement>*/
	
	/*<replacement>*/
	var internalUtil = {
		deprecate: require('util-deprecate')
	};
	/*</replacement>*/
	
	/*<replacement>*/
	var Stream = require('./internal/streams/stream');
	/*</replacement>*/
	
	/*<replacement>*/
	
	var Buffer = require('safe-buffer').Buffer;
	var OurUint8Array = global.Uint8Array || function () {};
	function _uint8ArrayToBuffer(chunk) {
		return Buffer.from(chunk);
	}
	function _isUint8Array(obj) {
		return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;
	}
	
	/*</replacement>*/
	
	var destroyImpl = require('./internal/streams/destroy');
	
	util.inherits(Writable, Stream);
	
	function nop() {}
	
	function WritableState(options, stream) {
		Duplex = Duplex || require('./_stream_duplex');
	
		options = options || {};
	
		// Duplex streams are both readable and writable, but share
		// the same options object.
		// However, some cases require setting options to different
		// values for the readable and the writable sides of the duplex stream.
		// These options can be provided separately as readableXXX and writableXXX.
		var isDuplex = stream instanceof Duplex;
	
		// object stream flag to indicate whether or not this stream
		// contains buffers or objects.
		this.objectMode = !!options.objectMode;
	
		if (isDuplex) this.objectMode = this.objectMode || !!options.writableObjectMode;
	
		// the point at which write() starts returning false
		// Note: 0 is a valid value, means that we always return false if
		// the entire buffer is not flushed immediately on write()
		var hwm = options.highWaterMark;
		var writableHwm = options.writableHighWaterMark;
		var defaultHwm = this.objectMode ? 16 : 16 * 1024;
	
		if (hwm || hwm === 0) this.highWaterMark = hwm;else if (isDuplex && (writableHwm || writableHwm === 0)) this.highWaterMark = writableHwm;else this.highWaterMark = defaultHwm;
	
		// cast to ints.
		this.highWaterMark = Math.floor(this.highWaterMark);
	
		// if _final has been called
		this.finalCalled = false;
	
		// drain event flag.
		this.needDrain = false;
		// at the start of calling end()
		this.ending = false;
		// when end() has been called, and returned
		this.ended = false;
		// when 'finish' is emitted
		this.finished = false;
	
		// has it been destroyed
		this.destroyed = false;
	
		// should we decode strings into buffers before passing to _write?
		// this is here so that some node-core streams can optimize string
		// handling at a lower level.
		var noDecode = options.decodeStrings === false;
		this.decodeStrings = !noDecode;
	
		// Crypto is kind of old and crusty.  Historically, its default string
		// encoding is 'binary' so we have to make this configurable.
		// Everything else in the universe uses 'utf8', though.
		this.defaultEncoding = options.defaultEncoding || 'utf8';
	
		// not an actual buffer we keep track of, but a measurement
		// of how much we're waiting to get pushed to some underlying
		// socket or file.
		this.length = 0;
	
		// a flag to see when we're in the middle of a write.
		this.writing = false;
	
		// when true all writes will be buffered until .uncork() call
		this.corked = 0;
	
		// a flag to be able to tell if the onwrite cb is called immediately,
		// or on a later tick.  We set this to true at first, because any
		// actions that shouldn't happen until "later" should generally also
		// not happen before the first write call.
		this.sync = true;
	
		// a flag to know if we're processing previously buffered items, which
		// may call the _write() callback in the same tick, so that we don't
		// end up in an overlapped onwrite situation.
		this.bufferProcessing = false;
	
		// the callback that's passed to _write(chunk,cb)
		this.onwrite = function (er) {
			onwrite(stream, er);
		};
	
		// the callback that the user supplies to write(chunk,encoding,cb)
		this.writecb = null;
	
		// the amount that is being written when _write is called.
		this.writelen = 0;
	
		this.bufferedRequest = null;
		this.lastBufferedRequest = null;
	
		// number of pending user-supplied write callbacks
		// this must be 0 before 'finish' can be emitted
		this.pendingcb = 0;
	
		// emit prefinish if the only thing we're waiting for is _write cbs
		// This is relevant for synchronous Transform streams
		this.prefinished = false;
	
		// True if the error was already emitted and should not be thrown again
		this.errorEmitted = false;
	
		// count buffered requests
		this.bufferedRequestCount = 0;
	
		// allocate the first CorkedRequest, there is always
		// one allocated and free to use, and we maintain at most two
		this.corkedRequestsFree = new CorkedRequest(this);
	}
	
	WritableState.prototype.getBuffer = function getBuffer() {
		var current = this.bufferedRequest;
		var out = [];
		while (current) {
			out.push(current);
			current = current.next;
		}
		return out;
	};
	
	(function () {
		try {
			Object.defineProperty(WritableState.prototype, 'buffer', {
				get: internalUtil.deprecate(function () {
					return this.getBuffer();
				}, '_writableState.buffer is deprecated. Use _writableState.getBuffer ' + 'instead.', 'DEP0003')
			});
		} catch (_) {}
	})();
	
	// Test _writableState for inheritance to account for Duplex streams,
	// whose prototype chain only points to Readable.
	var realHasInstance;
	if (typeof Symbol === 'function' && Symbol.hasInstance && typeof Function.prototype[Symbol.hasInstance] === 'function') {
		realHasInstance = Function.prototype[Symbol.hasInstance];
		Object.defineProperty(Writable, Symbol.hasInstance, {
			value: function (object) {
				if (realHasInstance.call(this, object)) return true;
				if (this !== Writable) return false;
	
				return object && object._writableState instanceof WritableState;
			}
		});
	} else {
		realHasInstance = function (object) {
			return object instanceof this;
		};
	}
	
	function Writable(options) {
		Duplex = Duplex || require('./_stream_duplex');
	
		// Writable ctor is applied to Duplexes, too.
		// `realHasInstance` is necessary because using plain `instanceof`
		// would return false, as no `_writableState` property is attached.
	
		// Trying to use the custom `instanceof` for Writable here will also break the
		// Node.js LazyTransform implementation, which has a non-trivial getter for
		// `_writableState` that would lead to infinite recursion.
		if (!realHasInstance.call(Writable, this) && !(this instanceof Duplex)) {
			return new Writable(options);
		}
	
		this._writableState = new WritableState(options, this);
	
		// legacy.
		this.writable = true;
	
		if (options) {
			if (typeof options.write === 'function') this._write = options.write;
	
			if (typeof options.writev === 'function') this._writev = options.writev;
	
			if (typeof options.destroy === 'function') this._destroy = options.destroy;
	
			if (typeof options.final === 'function') this._final = options.final;
		}
	
		Stream.call(this);
	}
	
	// Otherwise people can pipe Writable streams, which is just wrong.
	Writable.prototype.pipe = function () {
		this.emit('error', new Error('Cannot pipe, not readable'));
	};
	
	function writeAfterEnd(stream, cb) {
		var er = new Error('write after end');
		// TODO: defer error events consistently everywhere, not just the cb
		stream.emit('error', er);
		pna.nextTick(cb, er);
	}
	
	// Checks that a user-supplied chunk is valid, especially for the particular
	// mode the stream is in. Currently this means that `null` is never accepted
	// and undefined/non-string values are only allowed in object mode.
	function validChunk(stream, state, chunk, cb) {
		var valid = true;
		var er = false;
	
		if (chunk === null) {
			er = new TypeError('May not write null values to stream');
		} else if (typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {
			er = new TypeError('Invalid non-string/buffer chunk');
		}
		if (er) {
			stream.emit('error', er);
			pna.nextTick(cb, er);
			valid = false;
		}
		return valid;
	}
	
	Writable.prototype.write = function (chunk, encoding, cb) {
		var state = this._writableState;
		var ret = false;
		var isBuf = !state.objectMode && _isUint8Array(chunk);
	
		if (isBuf && !Buffer.isBuffer(chunk)) {
			chunk = _uint8ArrayToBuffer(chunk);
		}
	
		if (typeof encoding === 'function') {
			cb = encoding;
			encoding = null;
		}
	
		if (isBuf) encoding = 'buffer';else if (!encoding) encoding = state.defaultEncoding;
	
		if (typeof cb !== 'function') cb = nop;
	
		if (state.ended) writeAfterEnd(this, cb);else if (isBuf || validChunk(this, state, chunk, cb)) {
			state.pendingcb++;
			ret = writeOrBuffer(this, state, isBuf, chunk, encoding, cb);
		}
	
		return ret;
	};
	
	Writable.prototype.cork = function () {
		var state = this._writableState;
	
		state.corked++;
	};
	
	Writable.prototype.uncork = function () {
		var state = this._writableState;
	
		if (state.corked) {
			state.corked--;
	
			if (!state.writing && !state.corked && !state.finished && !state.bufferProcessing && state.bufferedRequest) clearBuffer(this, state);
		}
	};
	
	Writable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {
		// node::ParseEncoding() requires lower case.
		if (typeof encoding === 'string') encoding = encoding.toLowerCase();
		if (!(['hex', 'utf8', 'utf-8', 'ascii', 'binary', 'base64', 'ucs2', 'ucs-2', 'utf16le', 'utf-16le', 'raw'].indexOf((encoding + '').toLowerCase()) > -1)) throw new TypeError('Unknown encoding: ' + encoding);
		this._writableState.defaultEncoding = encoding;
		return this;
	};
	
	function decodeChunk(state, chunk, encoding) {
		if (!state.objectMode && state.decodeStrings !== false && typeof chunk === 'string') {
			chunk = Buffer.from(chunk, encoding);
		}
		return chunk;
	}
	
	Object.defineProperty(Writable.prototype, 'writableHighWaterMark', {
		// making it explicit this property is not enumerable
		// because otherwise some prototype manipulation in
		// userland will fail
		enumerable: false,
		get: function () {
			return this._writableState.highWaterMark;
		}
	});
	
	// if we're already writing something, then just put this
	// in the queue, and wait our turn.  Otherwise, call _write
	// If we return false, then we need a drain event, so set that flag.
	function writeOrBuffer(stream, state, isBuf, chunk, encoding, cb) {
		if (!isBuf) {
			var newChunk = decodeChunk(state, chunk, encoding);
			if (chunk !== newChunk) {
				isBuf = true;
				encoding = 'buffer';
				chunk = newChunk;
			}
		}
		var len = state.objectMode ? 1 : chunk.length;
	
		state.length += len;
	
		var ret = state.length < state.highWaterMark;
		// we must ensure that previous needDrain will not be reset to false.
		if (!ret) state.needDrain = true;
	
		if (state.writing || state.corked) {
			var last = state.lastBufferedRequest;
			state.lastBufferedRequest = {
				chunk: chunk,
				encoding: encoding,
				isBuf: isBuf,
				callback: cb,
				next: null
			};
			if (last) {
				last.next = state.lastBufferedRequest;
			} else {
				state.bufferedRequest = state.lastBufferedRequest;
			}
			state.bufferedRequestCount += 1;
		} else {
			doWrite(stream, state, false, len, chunk, encoding, cb);
		}
	
		return ret;
	}
	
	function doWrite(stream, state, writev, len, chunk, encoding, cb) {
		state.writelen = len;
		state.writecb = cb;
		state.writing = true;
		state.sync = true;
		if (writev) stream._writev(chunk, state.onwrite);else stream._write(chunk, encoding, state.onwrite);
		state.sync = false;
	}
	
	function onwriteError(stream, state, sync, er, cb) {
		--state.pendingcb;
	
		if (sync) {
			// defer the callback if we are being called synchronously
			// to avoid piling up things on the stack
			pna.nextTick(cb, er);
			// this can emit finish, and it will always happen
			// after error
			pna.nextTick(finishMaybe, stream, state);
			stream._writableState.errorEmitted = true;
			stream.emit('error', er);
		} else {
			// the caller expect this to happen before if
			// it is async
			cb(er);
			stream._writableState.errorEmitted = true;
			stream.emit('error', er);
			// this can emit finish, but finish must
			// always follow error
			finishMaybe(stream, state);
		}
	}
	
	function onwriteStateUpdate(state) {
		state.writing = false;
		state.writecb = null;
		state.length -= state.writelen;
		state.writelen = 0;
	}
	
	function onwrite(stream, er) {
		var state = stream._writableState;
		var sync = state.sync;
		var cb = state.writecb;
	
		onwriteStateUpdate(state);
	
		if (er) onwriteError(stream, state, sync, er, cb);else {
			// Check if we're actually ready to finish, but don't emit yet
			var finished = needFinish(state);
	
			if (!finished && !state.corked && !state.bufferProcessing && state.bufferedRequest) {
				clearBuffer(stream, state);
			}
	
			if (sync) {
				/*<replacement>*/
				asyncWrite(afterWrite, stream, state, finished, cb);
				/*</replacement>*/
			} else {
				afterWrite(stream, state, finished, cb);
			}
		}
	}
	
	function afterWrite(stream, state, finished, cb) {
		if (!finished) onwriteDrain(stream, state);
		state.pendingcb--;
		cb();
		finishMaybe(stream, state);
	}
	
	// Must force callback to be called on nextTick, so that we don't
	// emit 'drain' before the write() consumer gets the 'false' return
	// value, and has a chance to attach a 'drain' listener.
	function onwriteDrain(stream, state) {
		if (state.length === 0 && state.needDrain) {
			state.needDrain = false;
			stream.emit('drain');
		}
	}
	
	// if there's something in the buffer waiting, then process it
	function clearBuffer(stream, state) {
		state.bufferProcessing = true;
		var entry = state.bufferedRequest;
	
		if (stream._writev && entry && entry.next) {
			// Fast case, write everything using _writev()
			var l = state.bufferedRequestCount;
			var buffer = new Array(l);
			var holder = state.corkedRequestsFree;
			holder.entry = entry;
	
			var count = 0;
			var allBuffers = true;
			while (entry) {
				buffer[count] = entry;
				if (!entry.isBuf) allBuffers = false;
				entry = entry.next;
				count += 1;
			}
			buffer.allBuffers = allBuffers;
	
			doWrite(stream, state, true, state.length, buffer, '', holder.finish);
	
			// doWrite is almost always async, defer these to save a bit of time
			// as the hot path ends with doWrite
			state.pendingcb++;
			state.lastBufferedRequest = null;
			if (holder.next) {
				state.corkedRequestsFree = holder.next;
				holder.next = null;
			} else {
				state.corkedRequestsFree = new CorkedRequest(state);
			}
			state.bufferedRequestCount = 0;
		} else {
			// Slow case, write chunks one-by-one
			while (entry) {
				var chunk = entry.chunk;
				var encoding = entry.encoding;
				var cb = entry.callback;
				var len = state.objectMode ? 1 : chunk.length;
	
				doWrite(stream, state, false, len, chunk, encoding, cb);
				entry = entry.next;
				state.bufferedRequestCount--;
				// if we didn't call the onwrite immediately, then
				// it means that we need to wait until it does.
				// also, that means that the chunk and cb are currently
				// being processed, so move the buffer counter past them.
				if (state.writing) {
					break;
				}
			}
	
			if (entry === null) state.lastBufferedRequest = null;
		}
	
		state.bufferedRequest = entry;
		state.bufferProcessing = false;
	}
	
	Writable.prototype._write = function (chunk, encoding, cb) {
		cb(new Error('_write() is not implemented'));
	};
	
	Writable.prototype._writev = null;
	
	Writable.prototype.end = function (chunk, encoding, cb) {
		var state = this._writableState;
	
		if (typeof chunk === 'function') {
			cb = chunk;
			chunk = null;
			encoding = null;
		} else if (typeof encoding === 'function') {
			cb = encoding;
			encoding = null;
		}
	
		if (chunk !== null && chunk !== undefined) this.write(chunk, encoding);
	
		// .end() fully uncorks
		if (state.corked) {
			state.corked = 1;
			this.uncork();
		}
	
		// ignore unnecessary end() calls.
		if (!state.ending && !state.finished) endWritable(this, state, cb);
	};
	
	function needFinish(state) {
		return state.ending && state.length === 0 && state.bufferedRequest === null && !state.finished && !state.writing;
	}
	function callFinal(stream, state) {
		stream._final(function (err) {
			state.pendingcb--;
			if (err) {
				stream.emit('error', err);
			}
			state.prefinished = true;
			stream.emit('prefinish');
			finishMaybe(stream, state);
		});
	}
	function prefinish(stream, state) {
		if (!state.prefinished && !state.finalCalled) {
			if (typeof stream._final === 'function') {
				state.pendingcb++;
				state.finalCalled = true;
				pna.nextTick(callFinal, stream, state);
			} else {
				state.prefinished = true;
				stream.emit('prefinish');
			}
		}
	}
	
	function finishMaybe(stream, state) {
		var need = needFinish(state);
		if (need) {
			prefinish(stream, state);
			if (state.pendingcb === 0) {
				state.finished = true;
				stream.emit('finish');
			}
		}
		return need;
	}
	
	function endWritable(stream, state, cb) {
		state.ending = true;
		finishMaybe(stream, state);
		if (cb) {
			if (state.finished) pna.nextTick(cb);else stream.once('finish', cb);
		}
		state.ended = true;
		stream.writable = false;
	}
	
	function onCorkedFinish(corkReq, state, err) {
		var entry = corkReq.entry;
		corkReq.entry = null;
		while (entry) {
			var cb = entry.callback;
			state.pendingcb--;
			cb(err);
			entry = entry.next;
		}
		if (state.corkedRequestsFree) {
			state.corkedRequestsFree.next = corkReq;
		} else {
			state.corkedRequestsFree = corkReq;
		}
	}
	
	Object.defineProperty(Writable.prototype, 'destroyed', {
		get: function () {
			if (this._writableState === undefined) {
				return false;
			}
			return this._writableState.destroyed;
		},
		set: function (value) {
			// we ignore the value if the stream
			// has not been initialized yet
			if (!this._writableState) {
				return;
			}
	
			// backward compatibility, the user is explicitly
			// managing destroyed
			this._writableState.destroyed = value;
		}
	});
	
	Writable.prototype.destroy = destroyImpl.destroy;
	Writable.prototype._undestroy = destroyImpl.undestroy;
	Writable.prototype._destroy = function (err, cb) {
		this.end();
		cb(err);
	};
	}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {},require("timers").setImmediate)
	},{"./_stream_duplex":98,"./internal/streams/destroy":104,"./internal/streams/stream":105,"_process":92,"core-util-is":14,"inherits":80,"process-nextick-args":91,"safe-buffer":110,"timers":112,"util-deprecate":115}],103:[function(require,module,exports){
	'use strict';
	
	function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
	
	var Buffer = require('safe-buffer').Buffer;
	var util = require('util');
	
	function copyBuffer(src, target, offset) {
		src.copy(target, offset);
	}
	
	module.exports = function () {
		function BufferList() {
			_classCallCheck(this, BufferList);
	
			this.head = null;
			this.tail = null;
			this.length = 0;
		}
	
		BufferList.prototype.push = function push(v) {
			var entry = { data: v, next: null };
			if (this.length > 0) this.tail.next = entry;else this.head = entry;
			this.tail = entry;
			++this.length;
		};
	
		BufferList.prototype.unshift = function unshift(v) {
			var entry = { data: v, next: this.head };
			if (this.length === 0) this.tail = entry;
			this.head = entry;
			++this.length;
		};
	
		BufferList.prototype.shift = function shift() {
			if (this.length === 0) return;
			var ret = this.head.data;
			if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next;
			--this.length;
			return ret;
		};
	
		BufferList.prototype.clear = function clear() {
			this.head = this.tail = null;
			this.length = 0;
		};
	
		BufferList.prototype.join = function join(s) {
			if (this.length === 0) return '';
			var p = this.head;
			var ret = '' + p.data;
			while (p = p.next) {
				ret += s + p.data;
			}return ret;
		};
	
		BufferList.prototype.concat = function concat(n) {
			if (this.length === 0) return Buffer.alloc(0);
			if (this.length === 1) return this.head.data;
			var ret = Buffer.allocUnsafe(n >>> 0);
			var p = this.head;
			var i = 0;
			while (p) {
				copyBuffer(p.data, ret, i);
				i += p.data.length;
				p = p.next;
			}
			return ret;
		};
	
		return BufferList;
	}();
	
	if (util && util.inspect && util.inspect.custom) {
		module.exports.prototype[util.inspect.custom] = function () {
			var obj = util.inspect({ length: this.length });
			return this.constructor.name + ' ' + obj;
		};
	}
	},{"safe-buffer":110,"util":11}],104:[function(require,module,exports){
	'use strict';
	
	/*<replacement>*/
	
	var pna = require('process-nextick-args');
	/*</replacement>*/
	
	// undocumented cb() API, needed for core, not for public API
	function destroy(err, cb) {
		var _this = this;
	
		var readableDestroyed = this._readableState && this._readableState.destroyed;
		var writableDestroyed = this._writableState && this._writableState.destroyed;
	
		if (readableDestroyed || writableDestroyed) {
			if (cb) {
				cb(err);
			} else if (err && (!this._writableState || !this._writableState.errorEmitted)) {
				pna.nextTick(emitErrorNT, this, err);
			}
			return this;
		}
	
		// we set destroyed to true before firing error callbacks in order
		// to make it re-entrance safe in case destroy() is called within callbacks
	
		if (this._readableState) {
			this._readableState.destroyed = true;
		}
	
		// if this is a duplex stream mark the writable part as destroyed as well
		if (this._writableState) {
			this._writableState.destroyed = true;
		}
	
		this._destroy(err || null, function (err) {
			if (!cb && err) {
				pna.nextTick(emitErrorNT, _this, err);
				if (_this._writableState) {
					_this._writableState.errorEmitted = true;
				}
			} else if (cb) {
				cb(err);
			}
		});
	
		return this;
	}
	
	function undestroy() {
		if (this._readableState) {
			this._readableState.destroyed = false;
			this._readableState.reading = false;
			this._readableState.ended = false;
			this._readableState.endEmitted = false;
		}
	
		if (this._writableState) {
			this._writableState.destroyed = false;
			this._writableState.ended = false;
			this._writableState.ending = false;
			this._writableState.finished = false;
			this._writableState.errorEmitted = false;
		}
	}
	
	function emitErrorNT(self, err) {
		self.emit('error', err);
	}
	
	module.exports = {
		destroy: destroy,
		undestroy: undestroy
	};
	},{"process-nextick-args":91}],105:[function(require,module,exports){
	module.exports = require('events').EventEmitter;
	
	},{"events":13}],106:[function(require,module,exports){
	var toString = {}.toString;
	
	module.exports = Array.isArray || function (arr) {
		return toString.call(arr) == '[object Array]';
	};
	
	},{}],107:[function(require,module,exports){
	// Copyright Joyent, Inc. and other Node contributors.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a
	// copy of this software and associated documentation files (the
	// "Software"), to deal in the Software without restriction, including
	// without limitation the rights to use, copy, modify, merge, publish,
	// distribute, sublicense, and/or sell copies of the Software, and to permit
	// persons to whom the Software is furnished to do so, subject to the
	// following conditions:
	//
	// The above copyright notice and this permission notice shall be included
	// in all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
	// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
	// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	// USE OR OTHER DEALINGS IN THE SOFTWARE.
	
	'use strict';
	
	/*<replacement>*/
	
	var Buffer = require('safe-buffer').Buffer;
	/*</replacement>*/
	
	var isEncoding = Buffer.isEncoding || function (encoding) {
		encoding = '' + encoding;
		switch (encoding && encoding.toLowerCase()) {
			case 'hex':case 'utf8':case 'utf-8':case 'ascii':case 'binary':case 'base64':case 'ucs2':case 'ucs-2':case 'utf16le':case 'utf-16le':case 'raw':
				return true;
			default:
				return false;
		}
	};
	
	function _normalizeEncoding(enc) {
		if (!enc) return 'utf8';
		var retried;
		while (true) {
			switch (enc) {
				case 'utf8':
				case 'utf-8':
					return 'utf8';
				case 'ucs2':
				case 'ucs-2':
				case 'utf16le':
				case 'utf-16le':
					return 'utf16le';
				case 'latin1':
				case 'binary':
					return 'latin1';
				case 'base64':
				case 'ascii':
				case 'hex':
					return enc;
				default:
					if (retried) return; // undefined
					enc = ('' + enc).toLowerCase();
					retried = true;
			}
		}
	};
	
	// Do not cache `Buffer.isEncoding` when checking encoding names as some
	// modules monkey-patch it to support additional encodings
	function normalizeEncoding(enc) {
		var nenc = _normalizeEncoding(enc);
		if (typeof nenc !== 'string' && (Buffer.isEncoding === isEncoding || !isEncoding(enc))) throw new Error('Unknown encoding: ' + enc);
		return nenc || enc;
	}
	
	// StringDecoder provides an interface for efficiently splitting a series of
	// buffers into a series of JS strings without breaking apart multi-byte
	// characters.
	exports.StringDecoder = StringDecoder;
	function StringDecoder(encoding) {
		this.encoding = normalizeEncoding(encoding);
		var nb;
		switch (this.encoding) {
			case 'utf16le':
				this.text = utf16Text;
				this.end = utf16End;
				nb = 4;
				break;
			case 'utf8':
				this.fillLast = utf8FillLast;
				nb = 4;
				break;
			case 'base64':
				this.text = base64Text;
				this.end = base64End;
				nb = 3;
				break;
			default:
				this.write = simpleWrite;
				this.end = simpleEnd;
				return;
		}
		this.lastNeed = 0;
		this.lastTotal = 0;
		this.lastChar = Buffer.allocUnsafe(nb);
	}
	
	StringDecoder.prototype.write = function (buf) {
		if (buf.length === 0) return '';
		var r;
		var i;
		if (this.lastNeed) {
			r = this.fillLast(buf);
			if (r === undefined) return '';
			i = this.lastNeed;
			this.lastNeed = 0;
		} else {
			i = 0;
		}
		if (i < buf.length) return r ? r + this.text(buf, i) : this.text(buf, i);
		return r || '';
	};
	
	StringDecoder.prototype.end = utf8End;
	
	// Returns only complete characters in a Buffer
	StringDecoder.prototype.text = utf8Text;
	
	// Attempts to complete a partial non-UTF-8 character using bytes from a Buffer
	StringDecoder.prototype.fillLast = function (buf) {
		if (this.lastNeed <= buf.length) {
			buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, this.lastNeed);
			return this.lastChar.toString(this.encoding, 0, this.lastTotal);
		}
		buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, buf.length);
		this.lastNeed -= buf.length;
	};
	
	// Checks the type of a UTF-8 byte, whether it's ASCII, a leading byte, or a
	// continuation byte. If an invalid byte is detected, -2 is returned.
	function utf8CheckByte(byte) {
		if (byte <= 0x7F) return 0;else if (byte >> 5 === 0x06) return 2;else if (byte >> 4 === 0x0E) return 3;else if (byte >> 3 === 0x1E) return 4;
		return byte >> 6 === 0x02 ? -1 : -2;
	}
	
	// Checks at most 3 bytes at the end of a Buffer in order to detect an
	// incomplete multi-byte UTF-8 character. The total number of bytes (2, 3, or 4)
	// needed to complete the UTF-8 character (if applicable) are returned.
	function utf8CheckIncomplete(self, buf, i) {
		var j = buf.length - 1;
		if (j < i) return 0;
		var nb = utf8CheckByte(buf[j]);
		if (nb >= 0) {
			if (nb > 0) self.lastNeed = nb - 1;
			return nb;
		}
		if (--j < i || nb === -2) return 0;
		nb = utf8CheckByte(buf[j]);
		if (nb >= 0) {
			if (nb > 0) self.lastNeed = nb - 2;
			return nb;
		}
		if (--j < i || nb === -2) return 0;
		nb = utf8CheckByte(buf[j]);
		if (nb >= 0) {
			if (nb > 0) {
				if (nb === 2) nb = 0;else self.lastNeed = nb - 3;
			}
			return nb;
		}
		return 0;
	}
	
	// Validates as many continuation bytes for a multi-byte UTF-8 character as
	// needed or are available. If we see a non-continuation byte where we expect
	// one, we "replace" the validated continuation bytes we've seen so far with
	// a single UTF-8 replacement character ('\ufffd'), to match v8's UTF-8 decoding
	// behavior. The continuation byte check is included three times in the case
	// where all of the continuation bytes for a character exist in the same buffer.
	// It is also done this way as a slight performance increase instead of using a
	// loop.
	function utf8CheckExtraBytes(self, buf, p) {
		if ((buf[0] & 0xC0) !== 0x80) {
			self.lastNeed = 0;
			return '\ufffd';
		}
		if (self.lastNeed > 1 && buf.length > 1) {
			if ((buf[1] & 0xC0) !== 0x80) {
				self.lastNeed = 1;
				return '\ufffd';
			}
			if (self.lastNeed > 2 && buf.length > 2) {
				if ((buf[2] & 0xC0) !== 0x80) {
					self.lastNeed = 2;
					return '\ufffd';
				}
			}
		}
	}
	
	// Attempts to complete a multi-byte UTF-8 character using bytes from a Buffer.
	function utf8FillLast(buf) {
		var p = this.lastTotal - this.lastNeed;
		var r = utf8CheckExtraBytes(this, buf, p);
		if (r !== undefined) return r;
		if (this.lastNeed <= buf.length) {
			buf.copy(this.lastChar, p, 0, this.lastNeed);
			return this.lastChar.toString(this.encoding, 0, this.lastTotal);
		}
		buf.copy(this.lastChar, p, 0, buf.length);
		this.lastNeed -= buf.length;
	}
	
	// Returns all complete UTF-8 characters in a Buffer. If the Buffer ended on a
	// partial character, the character's bytes are buffered until the required
	// number of bytes are available.
	function utf8Text(buf, i) {
		var total = utf8CheckIncomplete(this, buf, i);
		if (!this.lastNeed) return buf.toString('utf8', i);
		this.lastTotal = total;
		var end = buf.length - (total - this.lastNeed);
		buf.copy(this.lastChar, 0, end);
		return buf.toString('utf8', i, end);
	}
	
	// For UTF-8, a replacement character is added when ending on a partial
	// character.
	function utf8End(buf) {
		var r = buf && buf.length ? this.write(buf) : '';
		if (this.lastNeed) return r + '\ufffd';
		return r;
	}
	
	// UTF-16LE typically needs two bytes per character, but even if we have an even
	// number of bytes available, we need to check if we end on a leading/high
	// surrogate. In that case, we need to wait for the next two bytes in order to
	// decode the last character properly.
	function utf16Text(buf, i) {
		if ((buf.length - i) % 2 === 0) {
			var r = buf.toString('utf16le', i);
			if (r) {
				var c = r.charCodeAt(r.length - 1);
				if (c >= 0xD800 && c <= 0xDBFF) {
					this.lastNeed = 2;
					this.lastTotal = 4;
					this.lastChar[0] = buf[buf.length - 2];
					this.lastChar[1] = buf[buf.length - 1];
					return r.slice(0, -1);
				}
			}
			return r;
		}
		this.lastNeed = 1;
		this.lastTotal = 2;
		this.lastChar[0] = buf[buf.length - 1];
		return buf.toString('utf16le', i, buf.length - 1);
	}
	
	// For UTF-16LE we do not explicitly append special replacement characters if we
	// end on a partial character, we simply let v8 handle that.
	function utf16End(buf) {
		var r = buf && buf.length ? this.write(buf) : '';
		if (this.lastNeed) {
			var end = this.lastTotal - this.lastNeed;
			return r + this.lastChar.toString('utf16le', 0, end);
		}
		return r;
	}
	
	function base64Text(buf, i) {
		var n = (buf.length - i) % 3;
		if (n === 0) return buf.toString('base64', i);
		this.lastNeed = 3 - n;
		this.lastTotal = 3;
		if (n === 1) {
			this.lastChar[0] = buf[buf.length - 1];
		} else {
			this.lastChar[0] = buf[buf.length - 2];
			this.lastChar[1] = buf[buf.length - 1];
		}
		return buf.toString('base64', i, buf.length - n);
	}
	
	function base64End(buf) {
		var r = buf && buf.length ? this.write(buf) : '';
		if (this.lastNeed) return r + this.lastChar.toString('base64', 0, 3 - this.lastNeed);
		return r;
	}
	
	// Pass bytes on through for single-byte encodings (e.g. ascii, latin1, hex)
	function simpleWrite(buf) {
		return buf.toString(this.encoding);
	}
	
	function simpleEnd(buf) {
		return buf && buf.length ? this.write(buf) : '';
	}
	},{"safe-buffer":110}],108:[function(require,module,exports){
	exports = module.exports = require('./lib/_stream_readable.js');
	exports.Stream = exports;
	exports.Readable = exports;
	exports.Writable = require('./lib/_stream_writable.js');
	exports.Duplex = require('./lib/_stream_duplex.js');
	exports.Transform = require('./lib/_stream_transform.js');
	exports.PassThrough = require('./lib/_stream_passthrough.js');
	
	},{"./lib/_stream_duplex.js":98,"./lib/_stream_passthrough.js":99,"./lib/_stream_readable.js":100,"./lib/_stream_transform.js":101,"./lib/_stream_writable.js":102}],109:[function(require,module,exports){
	'use strict'
	
	function ReInterval (callback, interval, args) {
		var self = this;
	
		this._callback = callback;
		this._args = args;
	
		this._interval = setInterval(callback, interval, this._args);
	
		this.reschedule = function (interval) {
			// if no interval entered, use the interval passed in on creation
			if (!interval)
				interval = self._interval;
	
			if (self._interval)
				clearInterval(self._interval);
			self._interval = setInterval(self._callback, interval, self._args);
		};
	
		this.clear = function () {
			if (self._interval) {
				clearInterval(self._interval);
				self._interval = undefined;
			}
		};
		
		this.destroy = function () {
			if (self._interval) {
				clearInterval(self._interval);
			}
			self._callback = undefined;
			self._interval = undefined;
			self._args = undefined;
		};
	}
	
	function reInterval () {
		if (typeof arguments[0] !== 'function')
			throw new Error('callback needed');
		if (typeof arguments[1] !== 'number')
			throw new Error('interval needed');
	
		var args;
	
		if (arguments.length > 0) {
			args = new Array(arguments.length - 2);
	
			for (var i = 0; i < args.length; i++) {
				args[i] = arguments[i + 2];
			}
		}
	
		return new ReInterval(arguments[0], arguments[1], args);
	}
	
	module.exports = reInterval;
	
	},{}],110:[function(require,module,exports){
	/* eslint-disable node/no-deprecated-api */
	var buffer = require('buffer')
	var Buffer = buffer.Buffer
	
	// alternative to using Object.keys for old browsers
	function copyProps (src, dst) {
		for (var key in src) {
			dst[key] = src[key]
		}
	}
	if (Buffer.from && Buffer.alloc && Buffer.allocUnsafe && Buffer.allocUnsafeSlow) {
		module.exports = buffer
	} else {
		// Copy properties from require('buffer')
		copyProps(buffer, exports)
		exports.Buffer = SafeBuffer
	}
	
	function SafeBuffer (arg, encodingOrOffset, length) {
		return Buffer(arg, encodingOrOffset, length)
	}
	
	// Copy static methods from Buffer
	copyProps(Buffer, SafeBuffer)
	
	SafeBuffer.from = function (arg, encodingOrOffset, length) {
		if (typeof arg === 'number') {
			throw new TypeError('Argument must not be a number')
		}
		return Buffer(arg, encodingOrOffset, length)
	}
	
	SafeBuffer.alloc = function (size, fill, encoding) {
		if (typeof size !== 'number') {
			throw new TypeError('Argument must be a number')
		}
		var buf = Buffer(size)
		if (fill !== undefined) {
			if (typeof encoding === 'string') {
				buf.fill(fill, encoding)
			} else {
				buf.fill(fill)
			}
		} else {
			buf.fill(0)
		}
		return buf
	}
	
	SafeBuffer.allocUnsafe = function (size) {
		if (typeof size !== 'number') {
			throw new TypeError('Argument must be a number')
		}
		return Buffer(size)
	}
	
	SafeBuffer.allocUnsafeSlow = function (size) {
		if (typeof size !== 'number') {
			throw new TypeError('Argument must be a number')
		}
		return buffer.SlowBuffer(size)
	}
	
	},{"buffer":12}],111:[function(require,module,exports){
	module.exports = shift
	
	function shift (stream) {
		var rs = stream._readableState
		if (!rs) return null
		return rs.objectMode ? stream.read() : stream.read(getStateLength(rs))
	}
	
	function getStateLength (state) {
		if (state.buffer.length) {
			// Since node 6.3.0 state.buffer is a BufferList not an array
			if (state.buffer.head) {
				return state.buffer.head.data.length
			}
	
			return state.buffer[0].length
		}
	
		return state.length
	}
	
	},{}],112:[function(require,module,exports){
	(function (setImmediate,clearImmediate){
	var nextTick = require('process/browser.js').nextTick;
	var apply = Function.prototype.apply;
	var slice = Array.prototype.slice;
	var immediateIds = {};
	var nextImmediateId = 0;
	
	// DOM APIs, for completeness
	
	exports.setTimeout = function() {
		return new Timeout(apply.call(setTimeout, window, arguments), clearTimeout);
	};
	exports.setInterval = function() {
		return new Timeout(apply.call(setInterval, window, arguments), clearInterval);
	};
	exports.clearTimeout =
	exports.clearInterval = function(timeout) { timeout.close(); };
	
	function Timeout(id, clearFn) {
		this._id = id;
		this._clearFn = clearFn;
	}
	Timeout.prototype.unref = Timeout.prototype.ref = function() {};
	Timeout.prototype.close = function() {
		this._clearFn.call(window, this._id);
	};
	
	// Does not start the time, just sets up the members needed.
	exports.enroll = function(item, msecs) {
		clearTimeout(item._idleTimeoutId);
		item._idleTimeout = msecs;
	};
	
	exports.unenroll = function(item) {
		clearTimeout(item._idleTimeoutId);
		item._idleTimeout = -1;
	};
	
	exports._unrefActive = exports.active = function(item) {
		clearTimeout(item._idleTimeoutId);
	
		var msecs = item._idleTimeout;
		if (msecs >= 0) {
			item._idleTimeoutId = setTimeout(function onTimeout() {
				if (item._onTimeout)
					item._onTimeout();
			}, msecs);
		}
	};
	
	// That's not how node.js implements it but the exposed api is the same.
	exports.setImmediate = typeof setImmediate === "function" ? setImmediate : function(fn) {
		var id = nextImmediateId++;
		var args = arguments.length < 2 ? false : slice.call(arguments, 1);
	
		immediateIds[id] = true;
	
		nextTick(function onNextTick() {
			if (immediateIds[id]) {
				// fn.call() is faster so we optimize for the common use-case
				// @see http://jsperf.com/call-apply-segu
				if (args) {
					fn.apply(null, args);
				} else {
					fn.call(null);
				}
				// Prevent ids from leaking
				exports.clearImmediate(id);
			}
		});
	
		return id;
	};
	
	exports.clearImmediate = typeof clearImmediate === "function" ? clearImmediate : function(id) {
		delete immediateIds[id];
	};
	}).call(this,require("timers").setImmediate,require("timers").clearImmediate)
	},{"process/browser.js":92,"timers":112}],113:[function(require,module,exports){
	// Copyright Joyent, Inc. and other Node contributors.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a
	// copy of this software and associated documentation files (the
	// "Software"), to deal in the Software without restriction, including
	// without limitation the rights to use, copy, modify, merge, publish,
	// distribute, sublicense, and/or sell copies of the Software, and to permit
	// persons to whom the Software is furnished to do so, subject to the
	// following conditions:
	//
	// The above copyright notice and this permission notice shall be included
	// in all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
	// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
	// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	// USE OR OTHER DEALINGS IN THE SOFTWARE.
	
	'use strict';
	
	var punycode = require('punycode');
	var util = require('./util');
	
	exports.parse = urlParse;
	exports.resolve = urlResolve;
	exports.resolveObject = urlResolveObject;
	exports.format = urlFormat;
	
	exports.Url = Url;
	
	function Url() {
		this.protocol = null;
		this.slashes = null;
		this.auth = null;
		this.host = null;
		this.port = null;
		this.hostname = null;
		this.hash = null;
		this.search = null;
		this.query = null;
		this.pathname = null;
		this.path = null;
		this.href = null;
	}
	
	// Reference: RFC 3986, RFC 1808, RFC 2396
	
	// define these here so at least they only have to be
	// compiled once on the first module load.
	var protocolPattern = /^([a-z0-9.+-]+:)/i,
			portPattern = /:[0-9]*$/,
	
			// Special case for a simple path URL
			simplePathPattern = /^(\/\/?(?!\/)[^\?\s]*)(\?[^\s]*)?$/,
	
			// RFC 2396: characters reserved for delimiting URLs.
			// We actually just auto-escape these.
			delims = ['<', '>', '"', '`', ' ', '\r', '\n', '\t'],
	
			// RFC 2396: characters not allowed for various reasons.
			unwise = ['{', '}', '|', '\\', '^', '`'].concat(delims),
	
			// Allowed by RFCs, but cause of XSS attacks.  Always escape these.
			autoEscape = ['\''].concat(unwise),
			// Characters that are never ever allowed in a hostname.
			// Note that any invalid chars are also handled, but these
			// are the ones that are *expected* to be seen, so we fast-path
			// them.
			nonHostChars = ['%', '/', '?', ';', '#'].concat(autoEscape),
			hostEndingChars = ['/', '?', '#'],
			hostnameMaxLen = 255,
			hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/,
			hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/,
			// protocols that can allow "unsafe" and "unwise" chars.
			unsafeProtocol = {
				'javascript': true,
				'javascript:': true
			},
			// protocols that never have a hostname.
			hostlessProtocol = {
				'javascript': true,
				'javascript:': true
			},
			// protocols that always contain a // bit.
			slashedProtocol = {
				'http': true,
				'https': true,
				'ftp': true,
				'gopher': true,
				'file': true,
				'http:': true,
				'https:': true,
				'ftp:': true,
				'gopher:': true,
				'file:': true
			},
			querystring = require('querystring');
	
	function urlParse(url, parseQueryString, slashesDenoteHost) {
		if (url && util.isObject(url) && url instanceof Url) return url;
	
		var u = new Url;
		u.parse(url, parseQueryString, slashesDenoteHost);
		return u;
	}
	
	Url.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {
		if (!util.isString(url)) {
			throw new TypeError("Parameter 'url' must be a string, not " + typeof url);
		}
	
		// Copy chrome, IE, opera backslash-handling behavior.
		// Back slashes before the query string get converted to forward slashes
		// See: https://code.google.com/p/chromium/issues/detail?id=25916
		var queryIndex = url.indexOf('?'),
				splitter =
						(queryIndex !== -1 && queryIndex < url.indexOf('#')) ? '?' : '#',
				uSplit = url.split(splitter),
				slashRegex = /\\/g;
		uSplit[0] = uSplit[0].replace(slashRegex, '/');
		url = uSplit.join(splitter);
	
		var rest = url;
	
		// trim before proceeding.
		// This is to support parse stuff like "  http://foo.com  \n"
		rest = rest.trim();
	
		if (!slashesDenoteHost && url.split('#').length === 1) {
			// Try fast path regexp
			var simplePath = simplePathPattern.exec(rest);
			if (simplePath) {
				this.path = rest;
				this.href = rest;
				this.pathname = simplePath[1];
				if (simplePath[2]) {
					this.search = simplePath[2];
					if (parseQueryString) {
						this.query = querystring.parse(this.search.substr(1));
					} else {
						this.query = this.search.substr(1);
					}
				} else if (parseQueryString) {
					this.search = '';
					this.query = {};
				}
				return this;
			}
		}
	
		var proto = protocolPattern.exec(rest);
		if (proto) {
			proto = proto[0];
			var lowerProto = proto.toLowerCase();
			this.protocol = lowerProto;
			rest = rest.substr(proto.length);
		}
	
		// figure out if it's got a host
		// user@server is *always* interpreted as a hostname, and url
		// resolution will treat //foo/bar as host=foo,path=bar because that's
		// how the browser resolves relative URLs.
		if (slashesDenoteHost || proto || rest.match(/^\/\/[^@\/]+@[^@\/]+/)) {
			var slashes = rest.substr(0, 2) === '//';
			if (slashes && !(proto && hostlessProtocol[proto])) {
				rest = rest.substr(2);
				this.slashes = true;
			}
		}
	
		if (!hostlessProtocol[proto] &&
				(slashes || (proto && !slashedProtocol[proto]))) {
	
			// there's a hostname.
			// the first instance of /, ?, ;, or # ends the host.
			//
			// If there is an @ in the hostname, then non-host chars *are* allowed
			// to the left of the last @ sign, unless some host-ending character
			// comes *before* the @-sign.
			// URLs are obnoxious.
			//
			// ex:
			// http://a@b@c/ => user:a@b host:c
			// http://a@b?@c => user:a host:c path:/?@c
	
			// v0.12 TODO(isaacs): This is not quite how Chrome does things.
			// Review our test case against browsers more comprehensively.
	
			// find the first instance of any hostEndingChars
			var hostEnd = -1;
			for (var i = 0; i < hostEndingChars.length; i++) {
				var hec = rest.indexOf(hostEndingChars[i]);
				if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
					hostEnd = hec;
			}
	
			// at this point, either we have an explicit point where the
			// auth portion cannot go past, or the last @ char is the decider.
			var auth, atSign;
			if (hostEnd === -1) {
				// atSign can be anywhere.
				atSign = rest.lastIndexOf('@');
			} else {
				// atSign must be in auth portion.
				// http://a@b/c@d => host:b auth:a path:/c@d
				atSign = rest.lastIndexOf('@', hostEnd);
			}
	
			// Now we have a portion which is definitely the auth.
			// Pull that off.
			if (atSign !== -1) {
				auth = rest.slice(0, atSign);
				rest = rest.slice(atSign + 1);
				this.auth = decodeURIComponent(auth);
			}
	
			// the host is the remaining to the left of the first non-host char
			hostEnd = -1;
			for (var i = 0; i < nonHostChars.length; i++) {
				var hec = rest.indexOf(nonHostChars[i]);
				if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
					hostEnd = hec;
			}
			// if we still have not hit it, then the entire thing is a host.
			if (hostEnd === -1)
				hostEnd = rest.length;
	
			this.host = rest.slice(0, hostEnd);
			rest = rest.slice(hostEnd);
	
			// pull out port.
			this.parseHost();
	
			// we've indicated that there is a hostname,
			// so even if it's empty, it has to be present.
			this.hostname = this.hostname || '';
	
			// if hostname begins with [ and ends with ]
			// assume that it's an IPv6 address.
			var ipv6Hostname = this.hostname[0] === '[' &&
					this.hostname[this.hostname.length - 1] === ']';
	
			// validate a little.
			if (!ipv6Hostname) {
				var hostparts = this.hostname.split(/\./);
				for (var i = 0, l = hostparts.length; i < l; i++) {
					var part = hostparts[i];
					if (!part) continue;
					if (!part.match(hostnamePartPattern)) {
						var newpart = '';
						for (var j = 0, k = part.length; j < k; j++) {
							if (part.charCodeAt(j) > 127) {
								// we replace non-ASCII char with a temporary placeholder
								// we need this to make sure size of hostname is not
								// broken by replacing non-ASCII by nothing
								newpart += 'x';
							} else {
								newpart += part[j];
							}
						}
						// we test again with ASCII char only
						if (!newpart.match(hostnamePartPattern)) {
							var validParts = hostparts.slice(0, i);
							var notHost = hostparts.slice(i + 1);
							var bit = part.match(hostnamePartStart);
							if (bit) {
								validParts.push(bit[1]);
								notHost.unshift(bit[2]);
							}
							if (notHost.length) {
								rest = '/' + notHost.join('.') + rest;
							}
							this.hostname = validParts.join('.');
							break;
						}
					}
				}
			}
	
			if (this.hostname.length > hostnameMaxLen) {
				this.hostname = '';
			} else {
				// hostnames are always lower case.
				this.hostname = this.hostname.toLowerCase();
			}
	
			if (!ipv6Hostname) {
				// IDNA Support: Returns a punycoded representation of "domain".
				// It only converts parts of the domain name that
				// have non-ASCII characters, i.e. it doesn't matter if
				// you call it with a domain that already is ASCII-only.
				this.hostname = punycode.toASCII(this.hostname);
			}
	
			var p = this.port ? ':' + this.port : '';
			var h = this.hostname || '';
			this.host = h + p;
			this.href += this.host;
	
			// strip [ and ] from the hostname
			// the host field still retains them, though
			if (ipv6Hostname) {
				this.hostname = this.hostname.substr(1, this.hostname.length - 2);
				if (rest[0] !== '/') {
					rest = '/' + rest;
				}
			}
		}
	
		// now rest is set to the post-host stuff.
		// chop off any delim chars.
		if (!unsafeProtocol[lowerProto]) {
	
			// First, make 100% sure that any "autoEscape" chars get
			// escaped, even if encodeURIComponent doesn't think they
			// need to be.
			for (var i = 0, l = autoEscape.length; i < l; i++) {
				var ae = autoEscape[i];
				if (rest.indexOf(ae) === -1)
					continue;
				var esc = encodeURIComponent(ae);
				if (esc === ae) {
					esc = escape(ae);
				}
				rest = rest.split(ae).join(esc);
			}
		}
	
	
		// chop off from the tail first.
		var hash = rest.indexOf('#');
		if (hash !== -1) {
			// got a fragment string.
			this.hash = rest.substr(hash);
			rest = rest.slice(0, hash);
		}
		var qm = rest.indexOf('?');
		if (qm !== -1) {
			this.search = rest.substr(qm);
			this.query = rest.substr(qm + 1);
			if (parseQueryString) {
				this.query = querystring.parse(this.query);
			}
			rest = rest.slice(0, qm);
		} else if (parseQueryString) {
			// no query string, but parseQueryString still requested
			this.search = '';
			this.query = {};
		}
		if (rest) this.pathname = rest;
		if (slashedProtocol[lowerProto] &&
				this.hostname && !this.pathname) {
			this.pathname = '/';
		}
	
		//to support http.request
		if (this.pathname || this.search) {
			var p = this.pathname || '';
			var s = this.search || '';
			this.path = p + s;
		}
	
		// finally, reconstruct the href based on what has been validated.
		this.href = this.format();
		return this;
	};
	
	// format a parsed object into a url string
	function urlFormat(obj) {
		// ensure it's an object, and not a string url.
		// If it's an obj, this is a no-op.
		// this way, you can call url_format() on strings
		// to clean up potentially wonky urls.
		if (util.isString(obj)) obj = urlParse(obj);
		if (!(obj instanceof Url)) return Url.prototype.format.call(obj);
		return obj.format();
	}
	
	Url.prototype.format = function() {
		var auth = this.auth || '';
		if (auth) {
			auth = encodeURIComponent(auth);
			auth = auth.replace(/%3A/i, ':');
			auth += '@';
		}
	
		var protocol = this.protocol || '',
				pathname = this.pathname || '',
				hash = this.hash || '',
				host = false,
				query = '';
	
		if (this.host) {
			host = auth + this.host;
		} else if (this.hostname) {
			host = auth + (this.hostname.indexOf(':') === -1 ?
					this.hostname :
					'[' + this.hostname + ']');
			if (this.port) {
				host += ':' + this.port;
			}
		}
	
		if (this.query &&
				util.isObject(this.query) &&
				Object.keys(this.query).length) {
			query = querystring.stringify(this.query);
		}
	
		var search = this.search || (query && ('?' + query)) || '';
	
		if (protocol && protocol.substr(-1) !== ':') protocol += ':';
	
		// only the slashedProtocols get the //.  Not mailto:, xmpp:, etc.
		// unless they had them to begin with.
		if (this.slashes ||
				(!protocol || slashedProtocol[protocol]) && host !== false) {
			host = '//' + (host || '');
			if (pathname && pathname.charAt(0) !== '/') pathname = '/' + pathname;
		} else if (!host) {
			host = '';
		}
	
		if (hash && hash.charAt(0) !== '#') hash = '#' + hash;
		if (search && search.charAt(0) !== '?') search = '?' + search;
	
		pathname = pathname.replace(/[?#]/g, function(match) {
			return encodeURIComponent(match);
		});
		search = search.replace('#', '%23');
	
		return protocol + host + pathname + search + hash;
	};
	
	function urlResolve(source, relative) {
		return urlParse(source, false, true).resolve(relative);
	}
	
	Url.prototype.resolve = function(relative) {
		return this.resolveObject(urlParse(relative, false, true)).format();
	};
	
	function urlResolveObject(source, relative) {
		if (!source) return relative;
		return urlParse(source, false, true).resolveObject(relative);
	}
	
	Url.prototype.resolveObject = function(relative) {
		if (util.isString(relative)) {
			var rel = new Url();
			rel.parse(relative, false, true);
			relative = rel;
		}
	
		var result = new Url();
		var tkeys = Object.keys(this);
		for (var tk = 0; tk < tkeys.length; tk++) {
			var tkey = tkeys[tk];
			result[tkey] = this[tkey];
		}
	
		// hash is always overridden, no matter what.
		// even href="" will remove it.
		result.hash = relative.hash;
	
		// if the relative url is empty, then there's nothing left to do here.
		if (relative.href === '') {
			result.href = result.format();
			return result;
		}
	
		// hrefs like //foo/bar always cut to the protocol.
		if (relative.slashes && !relative.protocol) {
			// take everything except the protocol from relative
			var rkeys = Object.keys(relative);
			for (var rk = 0; rk < rkeys.length; rk++) {
				var rkey = rkeys[rk];
				if (rkey !== 'protocol')
					result[rkey] = relative[rkey];
			}
	
			//urlParse appends trailing / to urls like http://www.example.com
			if (slashedProtocol[result.protocol] &&
					result.hostname && !result.pathname) {
				result.path = result.pathname = '/';
			}
	
			result.href = result.format();
			return result;
		}
	
		if (relative.protocol && relative.protocol !== result.protocol) {
			// if it's a known url protocol, then changing
			// the protocol does weird things
			// first, if it's not file:, then we MUST have a host,
			// and if there was a path
			// to begin with, then we MUST have a path.
			// if it is file:, then the host is dropped,
			// because that's known to be hostless.
			// anything else is assumed to be absolute.
			if (!slashedProtocol[relative.protocol]) {
				var keys = Object.keys(relative);
				for (var v = 0; v < keys.length; v++) {
					var k = keys[v];
					result[k] = relative[k];
				}
				result.href = result.format();
				return result;
			}
	
			result.protocol = relative.protocol;
			if (!relative.host && !hostlessProtocol[relative.protocol]) {
				var relPath = (relative.pathname || '').split('/');
				while (relPath.length && !(relative.host = relPath.shift()));
				if (!relative.host) relative.host = '';
				if (!relative.hostname) relative.hostname = '';
				if (relPath[0] !== '') relPath.unshift('');
				if (relPath.length < 2) relPath.unshift('');
				result.pathname = relPath.join('/');
			} else {
				result.pathname = relative.pathname;
			}
			result.search = relative.search;
			result.query = relative.query;
			result.host = relative.host || '';
			result.auth = relative.auth;
			result.hostname = relative.hostname || relative.host;
			result.port = relative.port;
			// to support http.request
			if (result.pathname || result.search) {
				var p = result.pathname || '';
				var s = result.search || '';
				result.path = p + s;
			}
			result.slashes = result.slashes || relative.slashes;
			result.href = result.format();
			return result;
		}
	
		var isSourceAbs = (result.pathname && result.pathname.charAt(0) === '/'),
				isRelAbs = (
						relative.host ||
						relative.pathname && relative.pathname.charAt(0) === '/'
				),
				mustEndAbs = (isRelAbs || isSourceAbs ||
											(result.host && relative.pathname)),
				removeAllDots = mustEndAbs,
				srcPath = result.pathname && result.pathname.split('/') || [],
				relPath = relative.pathname && relative.pathname.split('/') || [],
				psychotic = result.protocol && !slashedProtocol[result.protocol];
	
		// if the url is a non-slashed url, then relative
		// links like ../.. should be able
		// to crawl up to the hostname, as well.  This is strange.
		// result.protocol has already been set by now.
		// Later on, put the first path part into the host field.
		if (psychotic) {
			result.hostname = '';
			result.port = null;
			if (result.host) {
				if (srcPath[0] === '') srcPath[0] = result.host;
				else srcPath.unshift(result.host);
			}
			result.host = '';
			if (relative.protocol) {
				relative.hostname = null;
				relative.port = null;
				if (relative.host) {
					if (relPath[0] === '') relPath[0] = relative.host;
					else relPath.unshift(relative.host);
				}
				relative.host = null;
			}
			mustEndAbs = mustEndAbs && (relPath[0] === '' || srcPath[0] === '');
		}
	
		if (isRelAbs) {
			// it's absolute.
			result.host = (relative.host || relative.host === '') ?
										relative.host : result.host;
			result.hostname = (relative.hostname || relative.hostname === '') ?
												relative.hostname : result.hostname;
			result.search = relative.search;
			result.query = relative.query;
			srcPath = relPath;
			// fall through to the dot-handling below.
		} else if (relPath.length) {
			// it's relative
			// throw away the existing file, and take the new path instead.
			if (!srcPath) srcPath = [];
			srcPath.pop();
			srcPath = srcPath.concat(relPath);
			result.search = relative.search;
			result.query = relative.query;
		} else if (!util.isNullOrUndefined(relative.search)) {
			// just pull out the search.
			// like href='?foo'.
			// Put this after the other two cases because it simplifies the booleans
			if (psychotic) {
				result.hostname = result.host = srcPath.shift();
				//occationaly the auth can get stuck only in host
				//this especially happens in cases like
				//url.resolveObject('mailto:local1@domain1', 'local2@domain2')
				var authInHost = result.host && result.host.indexOf('@') > 0 ?
												 result.host.split('@') : false;
				if (authInHost) {
					result.auth = authInHost.shift();
					result.host = result.hostname = authInHost.shift();
				}
			}
			result.search = relative.search;
			result.query = relative.query;
			//to support http.request
			if (!util.isNull(result.pathname) || !util.isNull(result.search)) {
				result.path = (result.pathname ? result.pathname : '') +
											(result.search ? result.search : '');
			}
			result.href = result.format();
			return result;
		}
	
		if (!srcPath.length) {
			// no path at all.  easy.
			// we've already handled the other stuff above.
			result.pathname = null;
			//to support http.request
			if (result.search) {
				result.path = '/' + result.search;
			} else {
				result.path = null;
			}
			result.href = result.format();
			return result;
		}
	
		// if a url ENDs in . or .., then it must get a trailing slash.
		// however, if it ends in anything else non-slashy,
		// then it must NOT get a trailing slash.
		var last = srcPath.slice(-1)[0];
		var hasTrailingSlash = (
				(result.host || relative.host || srcPath.length > 1) &&
				(last === '.' || last === '..') || last === '');
	
		// strip single dots, resolve double dots to parent dir
		// if the path tries to go above the root, `up` ends up > 0
		var up = 0;
		for (var i = srcPath.length; i >= 0; i--) {
			last = srcPath[i];
			if (last === '.') {
				srcPath.splice(i, 1);
			} else if (last === '..') {
				srcPath.splice(i, 1);
				up++;
			} else if (up) {
				srcPath.splice(i, 1);
				up--;
			}
		}
	
		// if the path is allowed to go above the root, restore leading ..s
		if (!mustEndAbs && !removeAllDots) {
			for (; up--; up) {
				srcPath.unshift('..');
			}
		}
	
		if (mustEndAbs && srcPath[0] !== '' &&
				(!srcPath[0] || srcPath[0].charAt(0) !== '/')) {
			srcPath.unshift('');
		}
	
		if (hasTrailingSlash && (srcPath.join('/').substr(-1) !== '/')) {
			srcPath.push('');
		}
	
		var isAbsolute = srcPath[0] === '' ||
				(srcPath[0] && srcPath[0].charAt(0) === '/');
	
		// put the host back
		if (psychotic) {
			result.hostname = result.host = isAbsolute ? '' :
																			srcPath.length ? srcPath.shift() : '';
			//occationaly the auth can get stuck only in host
			//this especially happens in cases like
			//url.resolveObject('mailto:local1@domain1', 'local2@domain2')
			var authInHost = result.host && result.host.indexOf('@') > 0 ?
											 result.host.split('@') : false;
			if (authInHost) {
				result.auth = authInHost.shift();
				result.host = result.hostname = authInHost.shift();
			}
		}
	
		mustEndAbs = mustEndAbs || (result.host && srcPath.length);
	
		if (mustEndAbs && !isAbsolute) {
			srcPath.unshift('');
		}
	
		if (!srcPath.length) {
			result.pathname = null;
			result.path = null;
		} else {
			result.pathname = srcPath.join('/');
		}
	
		//to support request.http
		if (!util.isNull(result.pathname) || !util.isNull(result.search)) {
			result.path = (result.pathname ? result.pathname : '') +
										(result.search ? result.search : '');
		}
		result.auth = relative.auth || result.auth;
		result.slashes = result.slashes || relative.slashes;
		result.href = result.format();
		return result;
	};
	
	Url.prototype.parseHost = function() {
		var host = this.host;
		var port = portPattern.exec(host);
		if (port) {
			port = port[0];
			if (port !== ':') {
				this.port = port.substr(1);
			}
			host = host.substr(0, host.length - port.length);
		}
		if (host) this.hostname = host;
	};
	
	},{"./util":114,"punycode":93,"querystring":96}],114:[function(require,module,exports){
	'use strict';
	
	module.exports = {
		isString: function(arg) {
			return typeof(arg) === 'string';
		},
		isObject: function(arg) {
			return typeof(arg) === 'object' && arg !== null;
		},
		isNull: function(arg) {
			return arg === null;
		},
		isNullOrUndefined: function(arg) {
			return arg == null;
		}
	};
	
	},{}],115:[function(require,module,exports){
	(function (global){
	
	/**
	 * Module exports.
	 */
	
	module.exports = deprecate;
	
	/**
	 * Mark that a method should not be used.
	 * Returns a modified function which warns once by default.
	 *
	 * If `localStorage.noDeprecation = true` is set, then it is a no-op.
	 *
	 * If `localStorage.throwDeprecation = true` is set, then deprecated functions
	 * will throw an Error when invoked.
	 *
	 * If `localStorage.traceDeprecation = true` is set, then deprecated functions
	 * will invoke `console.trace()` instead of `console.error()`.
	 *
	 * @param {Function} fn - the function to deprecate
	 * @param {String} msg - the string to print to the console when `fn` is invoked
	 * @returns {Function} a new "deprecated" version of `fn`
	 * @api public
	 */
	
	function deprecate (fn, msg) {
		if (config('noDeprecation')) {
			return fn;
		}
	
		var warned = false;
		function deprecated() {
			if (!warned) {
				if (config('throwDeprecation')) {
					throw new Error(msg);
				} else if (config('traceDeprecation')) {
					console.trace(msg);
				} else {
					console.warn(msg);
				}
				warned = true;
			}
			return fn.apply(this, arguments);
		}
	
		return deprecated;
	}
	
	/**
	 * Checks `localStorage` for boolean values for the given `name`.
	 *
	 * @param {String} name
	 * @returns {Boolean}
	 * @api private
	 */
	
	function config (name) {
		// accessing global.localStorage can trigger a DOMException in sandboxed iframes
		try {
			if (!global.localStorage) return false;
		} catch (_) {
			return false;
		}
		var val = global.localStorage[name];
		if (null == val) return false;
		return String(val).toLowerCase() === 'true';
	}
	
	}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
	},{}],116:[function(require,module,exports){
	module.exports = function isBuffer(arg) {
		return arg && typeof arg === 'object'
			&& typeof arg.copy === 'function'
			&& typeof arg.fill === 'function'
			&& typeof arg.readUInt8 === 'function';
	}
	},{}],117:[function(require,module,exports){
	(function (process,global){
	// Copyright Joyent, Inc. and other Node contributors.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a
	// copy of this software and associated documentation files (the
	// "Software"), to deal in the Software without restriction, including
	// without limitation the rights to use, copy, modify, merge, publish,
	// distribute, sublicense, and/or sell copies of the Software, and to permit
	// persons to whom the Software is furnished to do so, subject to the
	// following conditions:
	//
	// The above copyright notice and this permission notice shall be included
	// in all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
	// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
	// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	// USE OR OTHER DEALINGS IN THE SOFTWARE.
	
	var formatRegExp = /%[sdj%]/g;
	exports.format = function(f) {
		if (!isString(f)) {
			var objects = [];
			for (var i = 0; i < arguments.length; i++) {
				objects.push(inspect(arguments[i]));
			}
			return objects.join(' ');
		}
	
		var i = 1;
		var args = arguments;
		var len = args.length;
		var str = String(f).replace(formatRegExp, function(x) {
			if (x === '%%') return '%';
			if (i >= len) return x;
			switch (x) {
				case '%s': return String(args[i++]);
				case '%d': return Number(args[i++]);
				case '%j':
					try {
						return JSON.stringify(args[i++]);
					} catch (_) {
						return '[Circular]';
					}
				default:
					return x;
			}
		});
		for (var x = args[i]; i < len; x = args[++i]) {
			if (isNull(x) || !isObject(x)) {
				str += ' ' + x;
			} else {
				str += ' ' + inspect(x);
			}
		}
		return str;
	};
	
	
	// Mark that a method should not be used.
	// Returns a modified function which warns once by default.
	// If --no-deprecation is set, then it is a no-op.
	exports.deprecate = function(fn, msg) {
		// Allow for deprecating things in the process of starting up.
		if (isUndefined(global.process)) {
			return function() {
				return exports.deprecate(fn, msg).apply(this, arguments);
			};
		}
	
		if (process.noDeprecation === true) {
			return fn;
		}
	
		var warned = false;
		function deprecated() {
			if (!warned) {
				if (process.throwDeprecation) {
					throw new Error(msg);
				} else if (process.traceDeprecation) {
					console.trace(msg);
				} else {
					console.error(msg);
				}
				warned = true;
			}
			return fn.apply(this, arguments);
		}
	
		return deprecated;
	};
	
	
	var debugs = {};
	var debugEnviron;
	exports.debuglog = function(set) {
		if (isUndefined(debugEnviron))
			debugEnviron = process.env.NODE_DEBUG || '';
		set = set.toUpperCase();
		if (!debugs[set]) {
			if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
				var pid = process.pid;
				debugs[set] = function() {
					var msg = exports.format.apply(exports, arguments);
					console.error('%s %d: %s', set, pid, msg);
				};
			} else {
				debugs[set] = function() {};
			}
		}
		return debugs[set];
	};
	
	
	/**
	 * Echos the value of a value. Trys to print the value out
	 * in the best way possible given the different types.
	 *
	 * @param {Object} obj The object to print out.
	 * @param {Object} opts Optional options object that alters the output.
	 */
	/* legacy: obj, showHidden, depth, colors*/
	function inspect(obj, opts) {
		// default options
		var ctx = {
			seen: [],
			stylize: stylizeNoColor
		};
		// legacy...
		if (arguments.length >= 3) ctx.depth = arguments[2];
		if (arguments.length >= 4) ctx.colors = arguments[3];
		if (isBoolean(opts)) {
			// legacy...
			ctx.showHidden = opts;
		} else if (opts) {
			// got an "options" object
			exports._extend(ctx, opts);
		}
		// set default options
		if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
		if (isUndefined(ctx.depth)) ctx.depth = 2;
		if (isUndefined(ctx.colors)) ctx.colors = false;
		if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
		if (ctx.colors) ctx.stylize = stylizeWithColor;
		return formatValue(ctx, obj, ctx.depth);
	}
	exports.inspect = inspect;
	
	
	// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
	inspect.colors = {
		'bold' : [1, 22],
		'italic' : [3, 23],
		'underline' : [4, 24],
		'inverse' : [7, 27],
		'white' : [37, 39],
		'grey' : [90, 39],
		'black' : [30, 39],
		'blue' : [34, 39],
		'cyan' : [36, 39],
		'green' : [32, 39],
		'magenta' : [35, 39],
		'red' : [31, 39],
		'yellow' : [33, 39]
	};
	
	// Don't use 'blue' not visible on cmd.exe
	inspect.styles = {
		'special': 'cyan',
		'number': 'yellow',
		'boolean': 'yellow',
		'undefined': 'grey',
		'null': 'bold',
		'string': 'green',
		'date': 'magenta',
		// "name": intentionally not styling
		'regexp': 'red'
	};
	
	
	function stylizeWithColor(str, styleType) {
		var style = inspect.styles[styleType];
	
		if (style) {
			return '\u001b[' + inspect.colors[style][0] + 'm' + str +
						 '\u001b[' + inspect.colors[style][1] + 'm';
		} else {
			return str;
		}
	}
	
	
	function stylizeNoColor(str, styleType) {
		return str;
	}
	
	
	function arrayToHash(array) {
		var hash = {};
	
		array.forEach(function(val, idx) {
			hash[val] = true;
		});
	
		return hash;
	}
	
	
	function formatValue(ctx, value, recurseTimes) {
		// Provide a hook for user-specified inspect functions.
		// Check that value is an object with an inspect function on it
		if (ctx.customInspect &&
				value &&
				isFunction(value.inspect) &&
				// Filter out the util module, it's inspect function is special
				value.inspect !== exports.inspect &&
				// Also filter out any prototype objects using the circular check.
				!(value.constructor && value.constructor.prototype === value)) {
			var ret = value.inspect(recurseTimes, ctx);
			if (!isString(ret)) {
				ret = formatValue(ctx, ret, recurseTimes);
			}
			return ret;
		}
	
		// Primitive types cannot have properties
		var primitive = formatPrimitive(ctx, value);
		if (primitive) {
			return primitive;
		}
	
		// Look up the keys of the object.
		var keys = Object.keys(value);
		var visibleKeys = arrayToHash(keys);
	
		if (ctx.showHidden) {
			keys = Object.getOwnPropertyNames(value);
		}
	
		// IE doesn't make error fields non-enumerable
		// http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
		if (isError(value)
				&& (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
			return formatError(value);
		}
	
		// Some type of object without properties can be shortcutted.
		if (keys.length === 0) {
			if (isFunction(value)) {
				var name = value.name ? ': ' + value.name : '';
				return ctx.stylize('[Function' + name + ']', 'special');
			}
			if (isRegExp(value)) {
				return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
			}
			if (isDate(value)) {
				return ctx.stylize(Date.prototype.toString.call(value), 'date');
			}
			if (isError(value)) {
				return formatError(value);
			}
		}
	
		var base = '', array = false, braces = ['{', '}'];
	
		// Make Array say that they are Array
		if (isArray(value)) {
			array = true;
			braces = ['[', ']'];
		}
	
		// Make functions say that they are functions
		if (isFunction(value)) {
			var n = value.name ? ': ' + value.name : '';
			base = ' [Function' + n + ']';
		}
	
		// Make RegExps say that they are RegExps
		if (isRegExp(value)) {
			base = ' ' + RegExp.prototype.toString.call(value);
		}
	
		// Make dates with properties first say the date
		if (isDate(value)) {
			base = ' ' + Date.prototype.toUTCString.call(value);
		}
	
		// Make error with message first say the error
		if (isError(value)) {
			base = ' ' + formatError(value);
		}
	
		if (keys.length === 0 && (!array || value.length == 0)) {
			return braces[0] + base + braces[1];
		}
	
		if (recurseTimes < 0) {
			if (isRegExp(value)) {
				return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
			} else {
				return ctx.stylize('[Object]', 'special');
			}
		}
	
		ctx.seen.push(value);
	
		var output;
		if (array) {
			output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
		} else {
			output = keys.map(function(key) {
				return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
			});
		}
	
		ctx.seen.pop();
	
		return reduceToSingleString(output, base, braces);
	}
	
	
	function formatPrimitive(ctx, value) {
		if (isUndefined(value))
			return ctx.stylize('undefined', 'undefined');
		if (isString(value)) {
			var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
																							 .replace(/'/g, "\\'")
																							 .replace(/\\"/g, '"') + '\'';
			return ctx.stylize(simple, 'string');
		}
		if (isNumber(value))
			return ctx.stylize('' + value, 'number');
		if (isBoolean(value))
			return ctx.stylize('' + value, 'boolean');
		// For some reason typeof null is "object", so special case here.
		if (isNull(value))
			return ctx.stylize('null', 'null');
	}
	
	
	function formatError(value) {
		return '[' + Error.prototype.toString.call(value) + ']';
	}
	
	
	function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
		var output = [];
		for (var i = 0, l = value.length; i < l; ++i) {
			if (hasOwnProperty(value, String(i))) {
				output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
						String(i), true));
			} else {
				output.push('');
			}
		}
		keys.forEach(function(key) {
			if (!key.match(/^\d+$/)) {
				output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
						key, true));
			}
		});
		return output;
	}
	
	
	function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
		var name, str, desc;
		desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
		if (desc.get) {
			if (desc.set) {
				str = ctx.stylize('[Getter/Setter]', 'special');
			} else {
				str = ctx.stylize('[Getter]', 'special');
			}
		} else {
			if (desc.set) {
				str = ctx.stylize('[Setter]', 'special');
			}
		}
		if (!hasOwnProperty(visibleKeys, key)) {
			name = '[' + key + ']';
		}
		if (!str) {
			if (ctx.seen.indexOf(desc.value) < 0) {
				if (isNull(recurseTimes)) {
					str = formatValue(ctx, desc.value, null);
				} else {
					str = formatValue(ctx, desc.value, recurseTimes - 1);
				}
				if (str.indexOf('\n') > -1) {
					if (array) {
						str = str.split('\n').map(function(line) {
							return '  ' + line;
						}).join('\n').substr(2);
					} else {
						str = '\n' + str.split('\n').map(function(line) {
							return '   ' + line;
						}).join('\n');
					}
				}
			} else {
				str = ctx.stylize('[Circular]', 'special');
			}
		}
		if (isUndefined(name)) {
			if (array && key.match(/^\d+$/)) {
				return str;
			}
			name = JSON.stringify('' + key);
			if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
				name = name.substr(1, name.length - 2);
				name = ctx.stylize(name, 'name');
			} else {
				name = name.replace(/'/g, "\\'")
									 .replace(/\\"/g, '"')
									 .replace(/(^"|"$)/g, "'");
				name = ctx.stylize(name, 'string');
			}
		}
	
		return name + ': ' + str;
	}
	
	
	function reduceToSingleString(output, base, braces) {
		var numLinesEst = 0;
		var length = output.reduce(function(prev, cur) {
			numLinesEst++;
			if (cur.indexOf('\n') >= 0) numLinesEst++;
			return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
		}, 0);
	
		if (length > 60) {
			return braces[0] +
						 (base === '' ? '' : base + '\n ') +
						 ' ' +
						 output.join(',\n  ') +
						 ' ' +
						 braces[1];
		}
	
		return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
	}
	
	
	// NOTE: These type checking functions intentionally don't use `instanceof`
	// because it is fragile and can be easily faked with `Object.create()`.
	function isArray(ar) {
		return Array.isArray(ar);
	}
	exports.isArray = isArray;
	
	function isBoolean(arg) {
		return typeof arg === 'boolean';
	}
	exports.isBoolean = isBoolean;
	
	function isNull(arg) {
		return arg === null;
	}
	exports.isNull = isNull;
	
	function isNullOrUndefined(arg) {
		return arg == null;
	}
	exports.isNullOrUndefined = isNullOrUndefined;
	
	function isNumber(arg) {
		return typeof arg === 'number';
	}
	exports.isNumber = isNumber;
	
	function isString(arg) {
		return typeof arg === 'string';
	}
	exports.isString = isString;
	
	function isSymbol(arg) {
		return typeof arg === 'symbol';
	}
	exports.isSymbol = isSymbol;
	
	function isUndefined(arg) {
		return arg === void 0;
	}
	exports.isUndefined = isUndefined;
	
	function isRegExp(re) {
		return isObject(re) && objectToString(re) === '[object RegExp]';
	}
	exports.isRegExp = isRegExp;
	
	function isObject(arg) {
		return typeof arg === 'object' && arg !== null;
	}
	exports.isObject = isObject;
	
	function isDate(d) {
		return isObject(d) && objectToString(d) === '[object Date]';
	}
	exports.isDate = isDate;
	
	function isError(e) {
		return isObject(e) &&
				(objectToString(e) === '[object Error]' || e instanceof Error);
	}
	exports.isError = isError;
	
	function isFunction(arg) {
		return typeof arg === 'function';
	}
	exports.isFunction = isFunction;
	
	function isPrimitive(arg) {
		return arg === null ||
					 typeof arg === 'boolean' ||
					 typeof arg === 'number' ||
					 typeof arg === 'string' ||
					 typeof arg === 'symbol' ||  // ES6 symbol
					 typeof arg === 'undefined';
	}
	exports.isPrimitive = isPrimitive;
	
	exports.isBuffer = require('./support/isBuffer');
	
	function objectToString(o) {
		return Object.prototype.toString.call(o);
	}
	
	
	function pad(n) {
		return n < 10 ? '0' + n.toString(10) : n.toString(10);
	}
	
	
	var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
								'Oct', 'Nov', 'Dec'];
	
	// 26 Feb 16:19:34
	function timestamp() {
		var d = new Date();
		var time = [pad(d.getHours()),
								pad(d.getMinutes()),
								pad(d.getSeconds())].join(':');
		return [d.getDate(), months[d.getMonth()], time].join(' ');
	}
	
	
	// log is just a thin wrapper to console.log that prepends a timestamp
	exports.log = function() {
		console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));
	};
	
	
	/**
	 * Inherit the prototype methods from one constructor into another.
	 *
	 * The Function.prototype.inherits from lang.js rewritten as a standalone
	 * function (not on Function.prototype). NOTE: If this file is to be loaded
	 * during bootstrapping this function needs to be rewritten using some native
	 * functions as prototype setup using normal JavaScript does not work as
	 * expected during bootstrapping (see mirror.js in r114903).
	 *
	 * @param {function} ctor Constructor function which needs to inherit the
	 *     prototype.
	 * @param {function} superCtor Constructor function to inherit prototype from.
	 */
	exports.inherits = require('inherits');
	
	exports._extend = function(origin, add) {
		// Don't do anything if add isn't an object
		if (!add || !isObject(add)) return origin;
	
		var keys = Object.keys(add);
		var i = keys.length;
		while (i--) {
			origin[keys[i]] = add[keys[i]];
		}
		return origin;
	};
	
	function hasOwnProperty(obj, prop) {
		return Object.prototype.hasOwnProperty.call(obj, prop);
	}
	
	}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
	},{"./support/isBuffer":116,"_process":92,"inherits":80}],118:[function(require,module,exports){
	(function (process,global){
	'use strict'
	
	var Transform = require('readable-stream').Transform
	var duplexify = require('duplexify')
	var WS = require('ws')
	var Buffer = require('safe-buffer').Buffer
	
	module.exports = WebSocketStream
	
	function buildProxy (options, socketWrite, socketEnd) {
		var proxy = new Transform({
			objectMode: options.objectMode
		})
	
		proxy._write = socketWrite
		proxy._flush = socketEnd
	
		return proxy
	}
	
	function WebSocketStream(target, protocols, options) {
		var stream, socket
	
		var isBrowser = process.title === 'browser'
		var isNative = !!global.WebSocket
		var socketWrite = isBrowser ? socketWriteBrowser : socketWriteNode
	
		if (protocols && !Array.isArray(protocols) && 'object' === typeof protocols) {
			// accept the "options" Object as the 2nd argument
			options = protocols
			protocols = null
	
			if (typeof options.protocol === 'string' || Array.isArray(options.protocol)) {
				protocols = options.protocol;
			}
		}
	
		if (!options) options = {}
	
		if (options.objectMode === undefined) {
			options.objectMode = !(options.binary === true || options.binary === undefined)
		}
	
		var proxy = buildProxy(options, socketWrite, socketEnd)
	
		if (!options.objectMode) {
			proxy._writev = writev
		}
	
		// browser only: sets the maximum socket buffer size before throttling
		var bufferSize = options.browserBufferSize || 1024 * 512
	
		// browser only: how long to wait when throttling
		var bufferTimeout = options.browserBufferTimeout || 1000
	
		// use existing WebSocket object that was passed in
		if (typeof target === 'object') {
			socket = target
		// otherwise make a new one
		} else {
			// special constructor treatment for native websockets in browsers, see
			// https://github.com/maxogden/websocket-stream/issues/82
			if (isNative && isBrowser) {
				socket = new WS(target, protocols)
			} else {
				socket = new WS(target, protocols, options)
			}
	
			socket.binaryType = 'arraybuffer'
		}
	
		// was already open when passed in
		if (socket.readyState === socket.OPEN) {
			stream = proxy
		} else {
			stream = duplexify.obj()
			socket.onopen = onopen
		}
	
		stream.socket = socket
	
		socket.onclose = onclose
		socket.onerror = onerror
		socket.onmessage = onmessage
	
		proxy.on('close', destroy)
	
		var coerceToBuffer = !options.objectMode
	
		function socketWriteNode(chunk, enc, next) {
			// avoid errors, this never happens unless
			// destroy() is called
			if (socket.readyState !== socket.OPEN) {
				next()
				return
			}
	
			if (coerceToBuffer && typeof chunk === 'string') {
				chunk = Buffer.from(chunk, 'utf8')
			}
			socket.send(chunk, next)
		}
	
		function socketWriteBrowser(chunk, enc, next) {
			if (socket.bufferedAmount > bufferSize) {
				setTimeout(socketWriteBrowser, bufferTimeout, chunk, enc, next)
				return
			}
	
			if (coerceToBuffer && typeof chunk === 'string') {
				chunk = Buffer.from(chunk, 'utf8')
			}
	
			try {
				socket.send(chunk)
			} catch(err) {
				return next(err)
			}
	
			next()
		}
	
		function socketEnd(done) {
			socket.close()
			done()
		}
	
		function onopen() {
			stream.setReadable(proxy)
			stream.setWritable(proxy)
			stream.emit('connect')
		}
	
		function onclose() {
			stream.end()
			stream.destroy()
		}
	
		function onerror(err) {
			stream.destroy(err)
		}
	
		function onmessage(event) {
			var data = event.data
			if (data instanceof ArrayBuffer) data = Buffer.from(data)
			else data = Buffer.from(data, 'utf8')
			proxy.push(data)
		}
	
		function destroy() {
			socket.close()
		}
	
		// this is to be enabled only if objectMode is false
		function writev (chunks, cb) {
			var buffers = new Array(chunks.length)
			for (var i = 0; i < chunks.length; i++) {
				if (typeof chunks[i].chunk === 'string') {
					buffers[i] = Buffer.from(chunks[i], 'utf8')
				} else {
					buffers[i] = chunks[i].chunk
				}
			}
	
			this._write(Buffer.concat(buffers), 'binary', cb)
		}
	
		return stream
	}
	
	}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
	},{"_process":92,"duplexify":17,"readable-stream":108,"safe-buffer":110,"ws":119}],119:[function(require,module,exports){
	
	var ws = null
	
	if (typeof WebSocket !== 'undefined') {
		ws = WebSocket
	} else if (typeof MozWebSocket !== 'undefined') {
		ws = MozWebSocket
	} else if (typeof window !== 'undefined') {
		ws = window.WebSocket || window.MozWebSocket
	}
	
	module.exports = ws
	
	},{}],120:[function(require,module,exports){
	// Returns a wrapper function that returns a wrapped callback
	// The wrapper function should do some stuff, and return a
	// presumably different callback function.
	// This makes sure that own properties are retained, so that
	// decorations and such are not lost along the way.
	module.exports = wrappy
	function wrappy (fn, cb) {
		if (fn && cb) return wrappy(fn)(cb)
	
		if (typeof fn !== 'function')
			throw new TypeError('need wrapper function')
	
		Object.keys(fn).forEach(function (k) {
			wrapper[k] = fn[k]
		})
	
		return wrapper
	
		function wrapper() {
			var args = new Array(arguments.length)
			for (var i = 0; i < args.length; i++) {
				args[i] = arguments[i]
			}
			var ret = fn.apply(this, args)
			var cb = args[args.length-1]
			if (typeof ret === 'function' && ret !== cb) {
				Object.keys(cb).forEach(function (k) {
					ret[k] = cb[k]
				})
			}
			return ret
		}
	}
	
	},{}],121:[function(require,module,exports){
	module.exports = extend
	
	var hasOwnProperty = Object.prototype.hasOwnProperty;
	
	function extend() {
			var target = {}
	
			for (var i = 0; i < arguments.length; i++) {
					var source = arguments[i]
	
					for (var key in source) {
							if (hasOwnProperty.call(source, key)) {
									target[key] = source[key]
							}
					}
			}
	
			return target
	}
	
	},{}]},{},[9])(9)
	});
	